Make sure your Oculus Quest 3 (or VR headset) and Steam VR are up to
date. Sometimes a missing VR software or game update can cause startup
issues Tutuapp
If possible, try connecting your PC and Quest 3 to a dedicated network
(ideally a 5GHz network) without other devices that could be hogging the
bandwidth. Test your network speed, especially if you're using wireless.
Slow speeds could be causing late...