How to unset WooCommerce order actions. For more info see https://philkurth.com.au/articles/how-to-unset-woocommerce-order-actions/

unset-woocommerce-order-actions.php

<?php

add_filter( 'woocommerce_order_actions', function ( $actions ) {
	
    	// Unset whatever actions you don't need available in the
    	// WooCommerce order edit screen.
	unset( $actions['send_order_details_admin'] );
	unset( $actions['send_order_details'] );
	unset( $actions['regenerate_download_permissions'] );
	
	return $actions;
}, 20 );