My mom used to be awesome with our Windows 95 Packard Bell [...] Now she struggles and panics to do the most basic thing if it’s not 1-step on her iPhone.
Hey, pardon me if I'm overstepping, but I'm going through the evaluation process with my mom right now and this could be an early sign of dementia (one that we initially dismissed). It could be nothing, but it might be a good idea to get her checked out if you have any other reason to be concerned.