As far a 2FA, Duo Mobile does not have the delay, but the other 2 I use do have the delay. I actually missed a delivery on Saturday because of the delay, by the time the notification came in and I got the app open and connected to the doorbell, to see what/who was at the door they were already gone.

Yes 16 pro. But I am seeing improvement. Some apps are still delayed. Ring is one of them.

Unacceptable does not even come close. I have delivery drivers ring my doorbell and they have walked away before I get the notification and the app opened. It's gone from 10 sec to open the app and connect to 25+ secs. I missed an important delivery due to this delay. The masses are not going to be happy once they figure it out.

That did not work for me :) Changing to non us disabled Apple Intelligence. Changing back to US and it enable Apple Intelligence and the delay returned.