The 12 mini had really poor battery life. I have the normal 12 myself, and even that one has underwhelming battery life, but the mini was way worse. Don’t know about 13, but I would hope that recent advances in chip efficiency and battery technology would allow for making small phones with good battery life. Just please make it a little chonkier if you have to.

The Fairphone is interesting, but it is also enormous unfortunately

Well, I can’t speak for everyone else, but I can’t go back because they don’t sell any small phones.