Hello zekepotratz,
To help us get a better understanding of the issue, we’d like to ask a few questions.
1. If you use your AirPods with multiple devices, does the same issue occur with all devices?
2. Does the issue happen with all audio, or only audio when using certain apps?
3. Does adjusting the Audio Balance improve the issue at all?
The above details will help us plan how to proceed.
Please also check out this link, which explains how to adjust and customize headphone levels on iPhone, which may help with this issue: If your left or right AirPod isn't working
If there's low volume in one AirPod
If your left or right AirPod isn't playing any sound, or if the volume is too quiet, follow these steps:
1. Check the microphone and speaker mesh on each AirPod.

2. If you see any debris, clean your AirPods using the guidelines in this article, and see if that fixes the issue.
3. Go to Settings > Accessibility > Audio/Visual > Balance, and make sure that the balance is set in the middle.
Thanks!