Unable to use Apple Account for iMessage on iPhone 11 iOS 18.7.1

how to fix iMessage I can’t use my apple id to use iMessage or my phone number iv’e try all to fix my iMessage but it’s still the same I created a new apple account but it’s didn’t work please someone help me I have iPhone 11 iOS 18.7.1.

[Re-Titled by Moderator]

Original Title: imessage