Didn’t receive The massage for FaceTime phone number activation
Hey there Hassan,
We'd like to help get FaceTime activated on your iPhone.
You mentioned not receiving a 'message' for activating FaceTime on your iPhone, but there isn't a message needed to activate FaceTime. If you're referring instead to not receiving a verification code to sign in with your Apple ID, this link will help you obtain one: Get a verification code and sign in with two-factor authentication
This link will help if If you get an error when trying to activate iMessage or FaceTime.
If you need more help, we recommend contacting Apple Support here: Get Support
Have a good one!