What Apple Pencil that work on ipad air 5 generation??

See:

Select Apple Pencil - Apple

There is no iPad Air 5th generation. 4th generation was just announced today, for delivery in October.

BTW, I have asked the hosts to move your post to the iPad forum.

Neither of the Apple Pencils are compatible with that model.

There are some pencils from other vendors that will work with in, but only in their apps.