I accidentally disabled the grapheneos feature that notifies you in the current user profile of notifications in the other profiles. I silenced the notification permanently. I did this by pulling the curtain bar down in the owner profile and disabling the grapheneos system app from being able to notify in the profile in use. The problem is that I can't find what I blocked but its caused all notifications from other profiles to the active one to stop. Can anyone tell me which system app needs this permission re-granted?

Thanks.

Settings > Apps > See all apps > Tap 3-Dots in the top right > Show system > GrapheneOS > Notifications > Enable "Other users"

Beautiful! Thank you!

I've got a few more problems with specific apps but I'll start a new post for that.

Many thanks for the super speedy reply.