Android has gotten high refresh and variable refresh which is great for battery life. Other than that just raw speed, which is usually just throttled down for better battery life and monstrous huge screens.
As far as I can see on the apple side they haven't seen anything but incremental, and sometimes increments in the wrong direction, changes in the last 6 years.
You're on apple, they certainly haven't had a user noticeable change for the last 6 years.
For me on android the last "must have" was variable refresh up to 120hz. I'll probably even do a battery upgrade on my s21 when it can't last a full day rather than hit an s25.
The only blocker I've hit with is yuzu on android, which kind of just doesn't work at all still.
The main problem is they drop $20mil on effects and star faces and fucking spend $20/hr for a fucking committee to write a story in a week that wouldn't pass a screenwriting 101 course.
The problem with movies and games these days is where the money goes, not how much of it there is.
I think the most popular phone in the last ten years is an IPhone 5 w a broken screen.