solved
So I had same issue, static in right airpod. I returned them to the dealer and was contacted 2 weeks later (new zealand here) only to be told that my eapods were manufactured in november 2020 so were outside the warranty period by 1 month and therefore not covered ! Not happy about that.
Once I got them back I did all sorts of things to try fixing them . resetting, checking firmware update ,the stupid bluetack trick, nothing worked.
I still used them at work and would put them in only to make or receive calls/texts while driving .
Lately, the charging case with airpods inside, has fallen out of my top overalls pocket and hit the ground, spilling the airpods . This happened about 4 times that l remember.
Then I noticed that the static noise had disappeared and they have been working perfectly for the last week !! Hints at a loose connection inside to me. So if you've got nothing to loose try dropping them in their case from about chest height. just my observation. good luck !!!