Does apple mouse work with ipad 7 10.2 inch

Hi! Check the "Before you begin" section here:

Connect a Bluetooth mouse or trackpad to your iPad - Apple Support

If running the current iPadOS 10.5, then yes, IF you own an Apple Magic Mouse 2 or Magic Trackpad 2.

The 10 year old Magic Mouse 1 or Magic Trackpad 1 will work, also, with limited functionality.

Good Luck to You!