When playing our Unity (2020.2.1f1) game in standalone mode on the Quest 2 w/ Link, we see this error spammed in the console. Otherwise, the game seems to be running just fine.
WaitForLastPresentationAndGetTimestamp() was called multiple times in a row without calling GfxDeviceD3D11Base::PresentFrame
This (as many other thigs) is broken since years. You will probably find tons of other reports on this. Only help is to push Oculus deep into some Zuckhole and buy a better headset like the Valve Index, where they at least try to fix some bugs.