Hello and Welcome to the Apple Support Community Forum!
it sounds like your AirPods Pro Wireless Charging Case needs to be replaced.
Since this is a forum I would contact Apple and they will help you get your AirPods up and running again!
You can contact Apple Support via the Apple Support app on your iPhone or iPad, going to Support.apple.com or by finding your local Apple Support Phone number with this link https://support.apple.com/en-ca/HT201232
I did find an article but it seems you followed the steps in the article but I will just put it below anyways:
If your AirPods won't connect - Apple Support
Hope this Helps,
Cheers!