RawHTML adds a wrapper div when it shouldn't

.wp-env.json

{
	"plugins": [ "." ],
	"themes": [ "WordPress/twentytwentyfive" ]
}

example-static.php

<?php
/**
 * Plugin Name:       Example Static
 * Description:       Example block scaffolded with Create Block tool.
 * Version:           0.1.0
 * Requires at least: 6.7
 * Requires PHP:      7.4
 * Author:            The WordPress Contributors
 * License:           GPL-2.0-or-later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       example-static
 *
 * @package CreateBlock
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}
/**
 * Registers the block using a `blocks-manifest.php` file, which improves the performance of block type registration.
 * Behind the scenes, it also registers all assets so they can be enqueued
 * through the block editor in the corresponding context.
 *
 * @see https://make.wordpress.org/core/2025/03/13/more-efficient-block-type-registration-in-6-8/
 * @see https://make.wordpress.org/core/2024/10/17/new-block-type-registration-apis-to-improve-performance-in-wordpress-6-7/
 */
function create_block_example_static_block_init() {
	/**
	 * Registers the block(s) metadata from the `blocks-manifest.php` and registers the block type(s)
	 * based on the registered block metadata.
	 * Added in WordPress 6.8 to simplify the block metadata registration process added in WordPress 6.7.
	 *
	 * @see https://make.wordpress.org/core/2025/03/13/more-efficient-block-type-registration-in-6-8/
	 */
	if ( function_exists( 'wp_register_block_types_from_metadata_collection' ) ) {
		wp_register_block_types_from_metadata_collection( __DIR__ . '/build', __DIR__ . '/build/blocks-manifest.php' );
		return;
	}

	/**
	 * Registers the block(s) metadata from the `blocks-manifest.php` file.
	 * Added to WordPress 6.7 to improve the performance of block type registration.
	 *
	 * @see https://make.wordpress.org/core/2024/10/17/new-block-type-registration-apis-to-improve-performance-in-wordpress-6-7/
	 */
	if ( function_exists( 'wp_register_block_metadata_collection' ) ) {
		wp_register_block_metadata_collection( __DIR__ . '/build', __DIR__ . '/build/blocks-manifest.php' );
	}
	/**
	 * Registers the block type(s) in the `blocks-manifest.php` file.
	 *
	 * @see https://developer.wordpress.org/reference/functions/register_block_type/
	 */
	$manifest_data = require __DIR__ . '/build/blocks-manifest.php';
	foreach ( array_keys( $manifest_data ) as $block_type ) {
		register_block_type( __DIR__ . "/build/{$block_type}" );
	}
}
add_action( 'init', 'create_block_example_static_block_init' );

package.json

{
	"name": "example-static",
	"version": "0.1.0",
	"description": "Example block scaffolded with Create Block tool.",
	"author": "The WordPress Contributors",
	"license": "GPL-2.0-or-later",
	"main": "build/index.js",
	"scripts": {
		"build": "wp-scripts build --blocks-manifest",
		"format": "wp-scripts format",
		"lint:css": "wp-scripts lint-style",
		"lint:js": "wp-scripts lint-js",
		"packages-update": "wp-scripts packages-update",
		"plugin-zip": "wp-scripts plugin-zip",
		"start": "wp-scripts start --blocks-manifest"
	},
	"devDependencies": {
		"@wordpress/scripts": "^30.18.0"
	}
}

src--example-static--block.json

{
	"$schema": "https://schemas.wp.org/trunk/block.json",
	"apiVersion": 3,
	"name": "create-block/example-static",
	"version": "0.1.0",
	"title": "Example Static",
	"category": "widgets",
	"icon": "smiley",
	"description": "Example block scaffolded with Create Block tool.",
	"example": {},
	"supports": {
		"html": false
	},
	"textdomain": "example-static",
	"editorScript": "file:./index.js",
	"editorStyle": "file:./index.css",
	"style": "file:./style-index.css",
	"viewScript": "file:./view.js"
}

src--example-static--edit.js

/**
 * Retrieves the translation of text.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/packages/packages-i18n/
 */
import { __ } from '@wordpress/i18n';

/**
 * React hook that is used to mark the block wrapper element.
 * It provides all the necessary props like the class name.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/packages/packages-block-editor/#useblockprops
 */
import { useBlockProps } from '@wordpress/block-editor';

import { RawHTML } from '@wordpress/element';

/**
 * Lets webpack process CSS, SASS or SCSS files referenced in JavaScript files.
 * Those files can contain any CSS code that gets applied to the editor.
 *
 * @see https://www.npmjs.com/package/@wordpress/scripts#using-css
 */
import './editor.scss';

/**
 * The edit function describes the structure of your block in the context of the
 * editor. This represents what the editor will render when the block is used.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-edit-save/#edit
 *
 * @return {Element} Element to render.
 */
export default function Edit() {
	const someHtmlContent = '<p>This is some <strong>HTML</strong> content that will be rendered in the editor.</p><p>There should be no wrapping <code>div</code>.</p>';
	return (
		<RawHTML children={ someHtmlContent } />
	);
}

src--example-static--editor.scss

/**
 * The following styles get applied inside the editor only.
 *
 * Replace them with your own styles or remove the file completely.
 */

.wp-block-create-block-example-static {
	border: 1px dotted #f00;
}

src--example-static--index.js

/**
 * Registers a new block provided a unique name and an object defining its behavior.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-registration/
 */
import { registerBlockType } from '@wordpress/blocks';

/**
 * Lets webpack process CSS, SASS or SCSS files referenced in JavaScript files.
 * All files containing `style` keyword are bundled together. The code used
 * gets applied both to the front of your site and to the editor.
 *
 * @see https://www.npmjs.com/package/@wordpress/scripts#using-css
 */
import './style.scss';

/**
 * Internal dependencies
 */
import Edit from './edit';
import save from './save';
import metadata from './block.json';

/**
 * Every block starts by registering a new block type definition.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-registration/
 */
registerBlockType( metadata.name, {
	/**
	 * @see ./edit.js
	 */
	edit: Edit,

	/**
	 * @see ./save.js
	 */
	save,
} );

src--example-static--save.js

/**
 * React hook that is used to mark the block wrapper element.
 * It provides all the necessary props like the class name.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/packages/packages-block-editor/#useblockprops
 */
import { useBlockProps } from '@wordpress/block-editor';

/**
 * The save function defines the way in which the different attributes should
 * be combined into the final markup, which is then serialized by the block
 * editor into `post_content`.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-edit-save/#save
 *
 * @return {Element} Element to render.
 */
export default function save() {
	return (
		<p { ...useBlockProps.save() }>
			{ 'Example Static – hello from the saved content!' }
		</p>
	);
}

src--example-static--style.scss

/**
 * The following styles get applied both on the front of your site
 * and in the editor.
 *
 * Replace them with your own styles or remove the file completely.
 */

.wp-block-create-block-example-static {
	background-color: #21759b;
	color: #fff;
	padding: 2px;
}

src--example-static--view.js

/**
 * Use this file for JavaScript code that you want to run in the front-end
 * on posts/pages that contain this block.
 *
 * When this file is defined as the value of the `viewScript` property
 * in `block.json` it will be enqueued on the front end of the site.
 *
 * Example:
 *
 * ```js
 * {
 *   "viewScript": "file:./view.js"
 * }
 * ```
 *
 * If you're not making any changes to this file because your project doesn't need any
 * JavaScript running in the front-end, then you should delete this file and remove
 * the `viewScript` property from `block.json`.
 *
 * @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-metadata/#view-script
 */

/* eslint-disable no-console */
console.log( 'Hello World! (from create-block-example-static block)' );
/* eslint-enable no-console */