AirTag not reachable on iOS 15.4.1

I was on a thread about this issue that seems to have since disappeared. Immediately after updating to 15.4.1 I was no longer able to use my phone to read a continuous glucose meter and apple pay no longer worked. This was IMMEDIATELY after the update. I use my phone to read a medical device, as do millions of other people worldwide. Apple is pushing this technology for medical devices. I've done three factory resets - two at the store. When tested my NFC system says that it works. However, it no longer reads my device or Apple Pay at the cash register. From a variety of forums, I can see that this is an issue that is now frequently occurring when people update their operating system. My phone is less than two years old. I was offered no solution at the apple store other than purchase a new phone. It is quite frankly grossly unfair to suggest that I need to purchase a new phone due to a known issue. Apple is jeopardizing the health of millions of people who use wearable medical devices. Those who use Apple Pay could be left stranded with no way to pay for their purchases. Imagine traveling and attempting to use Apple Pay and becoming stranded in an unfamiliar place. This is not ok. It is NOT solved. It must be fixed.

Any resolution? As soon as I updated to 15.4.1 I lost connectivity to my AirTags.

I reset the AirTags and my phone sees them, asks to register them as new AirTags and after initiating the process it loses connection and quits. Every time.

when I try to remove the old AirTag identifiers from my “find my” app I can start the process but once it actually tries to remove them the phone gets stuck in an infinite removal loop and freezes.