We are not mind readers, either!
The explanation you just gave me you had not explained in your initial post nor in your prior post replies.
And not updating her iPad Mini all along maybe was a mistake/disservice?
I am not judging here.
My mom is nearly 80, now, and has never been good with technology.
I got rid of her Mac ( she barely ever used it and would forget anything I woukd try to teach her ) and bought her the 1st iPad in 2010 and she has been able, mostly, to deal with iOS and the iPad pretty well and all of the iOS changes that have been made since she had that first iPad in 2010.
She has been using a first gen iPad Air ( 128 GBs model ) for the last 3-4 years, or so, and though has problems with touch ( she has a degenerative nerve/muscle disorder ) she does pretty well with iOS on the iPad, mostly, and has been doing okay with iOS 12.
She uses both a capacitive stylus and active, battery powered stylus for a touch interface and I just purchase a Bluetooth keyboard for her to use, ( her touch on the screen is pretty bad ), but I never see her use it.