SyncSlider.cs

using UdonSharp;
using UnityEngine;
using UnityEngine.UI;
using VRC.SDKBase;
using VRC.Udon;

public class SyncSlider : UdonSharpBehaviour
{
    [SerializeField] Slider _slider;
    [SerializeField] Text _text;
    [SerializeField] Text _ownerText;

    [UdonSynced(UdonSyncMode.None)]
    float _sliderValue;

    void LateUpdate()
    {
        _slider.value = _sliderValue;
        _text.text = _sliderValue.ToString("F2");
        _ownerText.text = Networking.GetOwner(this.gameObject).displayName;
    }

    public void SetValue()  //OnValueChangedで呼ぶ
    {
        _sliderValue = _slider.value;
    }

    public void ChangerOwner()  //EventTriggerで呼ぶ
    {
        if (!Networking.IsOwner(Networking.LocalPlayer, this.gameObject)) Networking.SetOwner(Networking.LocalPlayer, this.gameObject);
    }
}