[How to monitor latency in steamVR games?]

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.