Can’t verify AirPods Pro anymore after reset

I’ve had these AirPods Pro now for a little over a year I think and I’ve never really had issues with it apart from the fact that I kept having to disconnect from it in order to switch devices (from iPhone to iPad) and after doing a bit of research I found out that it should be able to connect to both my iPad and iPhone at the same time but it didn’t work so I tried resetting my AirPods Pro. I pressed Forget This Device and held the button at the back for 15 seconds until the lights started flickering pretty fast in the hopes that a reset would fix my problem. But now whenever I try to connect to it it says it can’t verify my AirPods

And when I tried to check coverage by checking the serial number it said “this is a serial number for a product that has been replaced”

How could this have happened and is there any way to get this fixed?