I got myself a plastic welder - the thing that melts little pieces of metal to strengthen plastic joints - now I can keep old plastic things in shape almost indefinitely. Cost like 10 usd or so and has prolonged the life of all manner of things.

If you still want to make the old headphones work these welders are a godsend, and with some small amount of diy work of cleaning, sanding and buffing you can easily hide these welds.

I personally like to leave them though since they accent that something that was once broken is whole again, and that it has a long history!

For whatever reason, in my experience, the 1st gen Airpods Pro seem to pair much more easily to non-Apple devices than the 2nd gen. I have a 1st gen pair more or less dedicated to my Linux PC, and they auto-pair 99% of the time within a few seconds.

Have you ever tried bluetooth wearables like the Bose SoundWear? Off topic but they are awesome