They do displayport over usb c I think. I almost got one a few months ago, or a pixel, but choked at the cost. Ended up with a Motorola Edge 40 and while it's fine, I wish I'd just spent a bit more and got a phone I actually wanted.
I've been thinking about Fairphone, but the 5 isn't available in the US to my understanding, unfortunately, and the 4 is a serious downgrade spec-wise.