Having trouble downloading an app
I'm trying to download an app - it's a government app and the requirements clearly state that "iOS 10.3.3" is needed to download the app. I have the dreaded 4th generation iPad (which I bought privately, unknowingly, just recently), for the specific purpose of getting this particular app as I found it too small to operate easily on my iPhone which BTW has iOS 13.5.1 Anyway, my iPad DOES have iOS 10.3.3 and when I select "Install" on the app I get the message that the app is not compatible with my iPad. Hence my question "Why not?" And is there a way that this can be done? Please help me, I cannot return my iPad.
iPad, iOS 10