Try opening an app on your phone in the oculus app which will then lead to that app turning on on your VR headset. If that happens then close out of the app and that should bring your home screen back up and working. That worked for me, hope it works...

I had this same issue. My daughter hadn't used her oculus quest 2 in maybe over a week and when we finally turned it on, the home screen was blank. I then went to my oculus app on my phone, made sure they were both connected and then I opened an app ...