https://www.gsmarena.com/results.php3?nYearMin=2018&fDisplay...
Nope. Literally seven phones, with the search just limited to sub 5" diagonal, Android 9 or 10, and a release in the last two years.
My phone now is an Xperia X Compact. Based on that list of seven the Xperia XZ2 Compact would be my next choice. Which actually looks like a fine phone, but not much of an upgrade versus what I already have. And it's from 2018 anyway, feels kind of silly to upgrade from a phone from 2017 to a phone from 2018 in 2020.
Librem... if you're listening... I'll pay extra for a phone that's under a 5" diagonal. You can quote me on that and call it a pre-order.
I don't have market research to back it up, but I do hear more and more people basically saying they haven't bought a new phone in years because they're all too big. Do they not include people who wear women's clothing in their market testing?