iPhone won’t verify my number. There is a spinning symbol next to it when i check it in the messages and FaceTime settings on my phone

So i updated my iPhone 13 to iOS 18.1 last night and went to sleep. Today i tried to send a text message but it sent green like a regular text message. I’ve been trying to figure out for the past hour or so what’s going on thinking it might have been my iCloud storage full but that’s not the issue. I checked my message settings and in the section that allows you to choose a sending and receiving number instead of a tick next to my number I’m getting a spinning symbol. I’m not sure how to fix this and would love any help i can get