My right airpod speaker is lower than my left

Has this always been an issue or just started happening recently? If the latter, did you examine the right AirPod to see if there is any debris/earwax that may be blocking it?

Ref:

• How to clean your AirPods, AirPods Pro, AirPods Max, and EarPods - Apple Support
• How to clean your AirPods and keep them clean! - iMore

If you purchased your AirPods from Apple or an authorized reseller, see these help resources:

AirPods Support - Official Apple Support