That's a great site!

And it really highlights the problem OP is highlighting. I've had Motorola Moto G's in the past, until they also got large, then I bought an iPhone 12 Mini. Not too happy with that purchase, I want to go back to Android (mainly because CarPlay's UX is so much worse than Android Auto), but unable to find any phone.

If on that website I put "Screen: 4 - 5.5 inch" and "Released: 2019 - 2021" it shows me a whopping amount of 4 phones, none of them by established brands but instead by random companies I never heard of (or AT&T ???), so the quest continues.

There simply seems to be no manufacturers interested in creating smaller Android phones as of today, still.