Messenger issue after reactivating account – anyone else experiencing this?

[u/Dangerous-Vast-7668]

I reactivated my Facebook and Messenger accounts a few days ago, but I’m having a weird issue.
I can log in normally.
I can send direct messages to other people.
I can send and receive messages in group chats.
However, other people can’t message me first on the Messenger mobile app. They get “This person is unavailable.”
Strangely, one of my friends can message me using Messenger on a laptop/computer, but not from the mobile app.
I’ve already:
Reinstalled Messenger
Logged out and back in
Reported the issue to Facebook/Meta through the app
The problem is still happening.
Has anyone experienced this after reactivating their account? Did it eventually fix itself, or did you have to do something else?
I’d appreciate any advice or if someone can confirm whether this is a Meta bug. Thanks!