iPhone unavailable after screen replacement

Please follow one of these two articles to reset your passcode:

iPhone is running iOS 15.2 or later: If you see a iPhone, iPad, or Apple Vision Pro unavailable message or Security Lockout screen - Apple Support

iPhone is running an earlier iOS: If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

Chattanoogan wrote:

It might seem that returning to the repair shop should be your first step.

Unfortunately, that won’t fix the problem. It’s too late for that. The only option now is to restore the phone.

It might seem that returning to the repair shop should be your first step.

I interpreted the OP’s post — perhaps incorrectly — as “display not working” …

… rather then the actual display of the “Unavailable” screen. 🤷🏼