A few days ago, my Pixel 8 stopped being able to send SMS messages to anyone except a single member of the family. It shows the texts as sent, but they are not delivered to the recipient. I installed Google Play services and turned on permissions, to no avail. I also tried other SMS apps. They will not work either. Recently, I performed a number of updates. This coincided with the start of the problem, but may or may not be the cause. Any help with restoring texting functionality would be greatly appreciated.
Outbound SMS text malfunction
praxeo
Take a look to the usage guide, carrier functionality section:
[If you are having problems sending or receiving SMS/MMS...]