I have gone in to every possible setting and ensured that my old phone number has been replaced with my new phone number; however, whenever I use the tool to fill in my information, the old phone number continues to fill, and I have to manually update it. Does anyone have any suggestions as to an area that I might have missed or what else might be taking place?
MacBook Pro 16″, macOS 13.1
If you mean in forms while using Safari, go into Safari, Settings, Autofill. Check if you have the 'Autofill web forms: Using information from my contacts' enabled. If you do, then check the phone number you have in the contact entry for yourself.
If you mean in forms while using Safari, go into Safari, Settings, Autofill. Check if you have the 'Autofill web forms: Using information from my contacts' enabled. If you do, then check the phone number you have in the contact entry for yourself.
Suggest starting by Logging into My Apple ID and verify what Phone Number is registered as a Trusted Device
refer to below image
Changing default after changing phone number
