My AirPods Pro not responding when not in charge

What do you mean when not in charge? Do you mean your battery is low or dead? Make sure your airpods case is fully charged.

Do a reset:

With the lid open, press and hold the setup button on the back of the case for about 15 seconds, until you see the status light flashing amber. When you reset your AirPods, the settings for your AirPods also reset. You can change your settings again.

Let me know if it works