Apple Pencil shows animation but not connecting

Hi, my Apple Pencil 2nd generation won’t connect to my iPad Air 5. I have reset my iPad many times and turned Bluetooth on and off multiple times but still no change.

When I attach the pencil to my iPad it says Apple Pencil at the top for about 30 seconds then disappears and the pencil didn’t connect. I also try a hard reset to my ipad, then, I can see only the animation of the pencil for a while, but not connecting.

I would really appreciate it if you could help me.