This problem has been ongoing for years.
I have iPhones. 13 Pro, 14 Pro, 14 Pro. I have 2 lines in question.
One line gets confirmation SMS's from Facebook (32665).
One line does not.
There are no blocks on the iPhone. We are receiving texts from everyone else, including other 5-digit numbers. The same Facebook texts come through to another line on our account. Facebook says it is sending the texts, but they are not being received.
There are no temporary blocks on any of our lines of 32665.
Dozens of other people on these forums have complained of the same issue for years.
My wife is about to get locked out of her Facebook account because the codes cannot be received.
Thank you for sharing these details, MattAlbrecht. You should have just received a Private Note from us. Please reply there, so we can look further into this issue with you.