Why does my left AirPod not connect but the right one is fine

I have the same problem. I have tried several methods but the most effective one is as follows. Take the working AirPod out of the case, keep the problematic one inside the case, keep the case open and press and hold the reset button on the case until it turns white. May take more than 30 seconds. Once it turns white both AirPods start working. Let me know if it works.

Hello,

See this:

If your left or right AirPod isn't working

Good luck.