Does anyone know how to perform a proper webtrtc chechk for leaks? or What's the best way to do a web

WebRTC leaks are sneaky. Most tests only check half the problem.

Use perfect-privacy.com/en/webrtc-leaktest for a deep webtrtc chechk.

If it leaks, your VPN might need a killswitch or better config. Or just disable WebRTC entirely.