Its more than just smaller hardware. App developers rarely take into account the ergonomics of the devices they build them for. Umpteen critical user interactions are always out of reach of your thumbs. Smaller phones make it that bit easier but have sadly now gone. I imagine 2024 will be the year Apple puts the iPhone 13 Mini out to pasture.

https://carlst-james.medium.com/ergonomorphism-next-big-thing-in-ux-f895495051ed