Not sure when the last time you tried Apple was, but on the newer phones at least they have motion reduction that has helped me a lot with motion sickness. YMMV though.

That's pretty much it. Android where does feature screen magnification, but I have no experience with that, so if you decide to try that out you're on your own. I do know that talk back runs like garbage though. Nowhere near as decent as on a smartphone. Android smart watches in general have been pretty disappointing, even for sighted people. Samsung offers a smoother experience, and the Apple watch has pretty much been kicking everyone else's ass when it comes to smart watches. Other than that, you've got fitness trackers which are both a toss-up and not what you're looking for.

if you don't want an Apple watch, then I suggest you look at one of Samsung smart watches.

do you get any headaches from watching tvs? I have horrible issues with headaches from tvs, but only started once I tried various new tvs since 2011. Before that, my tvs didn't really bother my head.... and it's hard to track down what is going on because some bother it much more than others.