StopVoiceSending 

Namespace: SynicSugar.RTC

public async UniTask<Result> StopVoiceSending()

Description 

Stop local user sending voice chat.
If UseOpenVC is true, toggles setting state to send vc. If false, a thread for PushToTalk will stop.

using SynicSugar.RTC;
using Cysharp.Threading.Tasks;
using UnityEngine;

public class VCSample : MonoBehaviour {
    public async UniTask StopVC(){
       await RTCManager.Instance.StopVoiceSending();
    }
}