Beginner-Kevin

Is there any way to display latency in HMDs when I play steamVR games ? I've tried many toolsets but it doesn't work properly. (e.g: fpsVR can display fps and CPU GPU load, but has no latency value) (e.g: virtual desktop app can display HMDs latency. But.... when I open other games, it can't be displayed on my steamVR games) Thanks.