Hello there Alan. Thank you for reaching out and for these information you have given. I hope that you will get the best recommendation from our fellow DJI co pilots who uses the iPad 4 Mini IOS 12.4.8 when flying there DJI Mavic Air 2. Just a reminder to please use a recommended mobile device for the DJI Fly application for compatibility and reliability purposes. For reference I will post the list of recommended mobile device for the DJI Mavic Air 2 and with the DJI Fly application. Thank you.
It's compatible but I have read many having glitches with the transmission feed due to the A8 processor. The newer the device, the better the performance.