My left AirPod has no sound coming out of it but the other one does what do i do?

If your left or right AirPod isn't working - Apple Support

Wouldn't know as I can only go by what you provide in your post.

If you have already done what was asked in that article, then you know your last step would be to contact Apple Support directly for further assistance. Did you? ... as this is an Apple-product user-to-user forum. Apple representatives, may or may not respond to posts here.