If you upgraded to v69 OS on Quest, I had problems with stuff breaking with v69. For me, it was the boundary function. v69 changed some boundary management features. Clearing the old boundaries fixed it. Something like, Settings->Physical Space->Clear boundaries.

The Quest auto-updates itself on reboot so it's on the latest version. I've recreated the boundaries quite often because the room changes. I'm not sure why VirtualDesktop stopped working. AirLink and SteamLink seem to work fine.