I love my iPhone 13 Mini. Its only issues are battery life (now), and non-competitive camera. I'm personally happy with the photos it takes, but then I look at my girlfriend's shots and get FOMO.
While I doubt it's economical, I'd love a small, simple phone with juiced up camera. I'd be fine with worse battery life as external batteries can remedy that in a pinch.
Unlike many it seems, I don't care much about the camera. I'd probably want some sort of camera for scanning QR codes, or snapping a quick photo of something I want to look up later, but otherwise I don't take photos or videos on my phone. I don't use any social media on my phone other than text messaging. This makes the smaller battery size/capacity a non-issue.
Since Apple no longer makes a reasonably-sized phone I'll probably go back to Android after this one dies or becomes unsupported.
I also think it's silly to carry a $1,000 device around with you everywhere, so a "premium" small phone is probably a non-starter for me. My favorite phones were the ~$200 Moto-G phones I had before I got the iPhone (it was a gift).