iPhone 13 not receiving SMS messages

I'm running iOS 15.6.1 on my new iPhone 13 Pro. I just restored to it from the latest backup on my laptop.

I don't seem to be getting any of the normal SMS messages (like news stuff, etc.) that I was getting just before the conversion.

Ordinarily I would have thought that it must be a problem within the particular app, but since it is happening across all apps (as far as I can tell), I'm thinking I must have a problem with my SMS settings, but I can't find where that might be.

Any suggestions are appreciated. Thanks!