jailbreak – Use 2nd Generation iPad (iOS 9.3.5) as touchscreen for late 2020 MacBook Air (Big Sur)

I teach online lessons and often use a digital whiteboard (Google Jamboard) to help teach. However, it can be difficult to write properly with a trackpad and so I tried using my old 2011 iPad. Unfortunately Google Jamboard (and seemingly all other apps) are unsupported on my iPad. Is there a way, through jailbreak or otherwise, to use my iPad as a touchscreen extension for my MacBook, or at least download Google Jamboard? The iPad is otherwise completely unused and SideCar unfortunately is not supported for such an old iPad.

Thank you for any help!