Slow Working on iPad 15.8.3

iPadOS 15.8.5 is the most recent version of iPadOS for the iPad Air2. There are no further updates.

You should update to the most recent version as this version will include essential security updates for your iPad. While the update will not necessarily improve the performance of your obsolete iPad, it will benefit from the most recent available patches.

Hi! It looks like your iPad Air 2 is obsolete. It will be slower because it is an older device not being able to hold up with newer software. Hope this helps.