Sony briefly had a Compact line. friend had a z3 compact and loved it. I can't imagine they're super usable these days though, at least not without some effort

also you may have better luck looking at what LTE bands a device supports vs official carrier compatibility lookups, if you arent already

edit: cubot pocket might work okay in some markets but it definitely will be spotty coverage wise

the last sony compact was the xz2 compact. 5" screen overall but only 2.6" wide so probably a lot nicer in the hand at least