Seats in a 2021 Forester Classic w/ Ford 450 chassis

One simple, inexpensive, low-tech solution to a too-low seat is to sit on a cushion. When I travel with my dear mother in my motorhome, she does this and it makes a big difference for her comfort. (I assume it would also help with vision when driving, but usually I am doing pretty much all of the driving. That's in no way a reflection on her driving skills, I hasten to add; she's an excellent, safe driver.)