This issue has been faced by many individuals but this is not something that can't be fixed, with right solutions applied it can be easily fixed, There could be several possible reasons why your AirPods are so quiet, and some here are some ways to fix them.
- Turn off Low Power mode on your iPhone.
- Turn off “Reduce Loud Sounds” on your iPhone. This feature sets a maximum volume limit, which can make the AirPods sound too low.
- Check the microphone and speaker mesh on each AirPod. If you see any debris, clean your AirPods
- Reset Your AirPods.
But if none these solutions worked then visit this detailed guide that covers 9 ways to fix AirPods volume problems that are too quiet. I hope this helps you solve your problem.