I can't send and receive iMessages on my Apple Watch Series 10
If you can't send and receive iMessages, there may be several causes of the problem.
Turn off iMessage in the settings on the paired phone and try setting up the phone for iMessaging again after some time.
Set the correct time zone, date and time in the settings on your Apple Watch.
Try sending an iMessage to another number.
Check if you can send and receive iMessages on the paired phone. If this is not possible, try setting up your phone for iMessaging again.