Check the microphone and speaker mesh on each airpod Learn how to fix airpods pro static noise in one ear by cleaning the mesh, resetting your airpods, updating firmware, and adjusting audio settings for a clear sound. If there's any debris, clean your airpods or your airpods pro
How to Fix AirPods Only Playing in One Ear
Go to settings > accessibility > audio/visual > balance, and make sure that the balance is set in the middle.
How to fix airpods only playing in one ear there are many reasons why your airpods might play in just one of your ears, and, depending on the cause of the issue, the solution will be different.