I rep their products so much I've been accused of being a shill, but I switched to Chinese brand smartphones years ago and will never look back. While US manufacturers were deleting features, Chinese manufacturers were adding them.
My current phone is an Ulefone Armor 18t, which features a 3.5mm jack, sd card slot, notification led, 6x led array flashlight, microscope, thermal camera, and a battery that lasts 3 days. And this is one of their older models, most of their newer phones come with floodlights, night vision cameras, and screens on both sides. There are dozens of other Chinese phone brands that are compatible with US 5g networks to chose from.
Not sure, I like the rugged phones so I couldnt recommend a smaller model offhand, though I know they exist.