This is a pretty big bummer, too, as the car I sold to make room for the Ascent was 14 years old, but did handle the mirror adjustments. I sit much taller than my wife, so this is a constant struggle. We both want to use and enjoy the new subaru, but it's quite annoying to get in after the other and have to adjust so much stuff when we used to just click our fobs on our old car.
I like my Ascent, but I feel like they missed quite a few little things like this that could have been done much better. Not having steering wheel heat on the remote start app (and the whole app kind of looking like a high school senior designed it in a weekend), the memory settings not including mirrors, etc. I guess you take a risk when you buy a new model of vehicle that they haven't polished it yet, but since so much of this is not unique to an Ascent, but kind of an expectation across any vehicle at the highest trim model, I had just assumed it would be there.