My right AirPod 2nd generation won’t play as loud as my left ear AirPod How can I fix this issue?

It may be an issue with the grills being blocked, try using a small amount of rubbing alcohol and a tooth brush to clear the grills ! 😊

Hello,

If you've already tried cleaning it, do this:

Go to Settings > Accessibility > Audio/Visual and scroll down to “Balance L vs R” (Adjust the audio volume balance) and make changes.

Good luck.