My phone is my sole PC and has been for about 7 months now. I use it for everything. I’m using nreal AR glasses for a massive virtual 80" screen via Dex. I use a Bluetooth mouse and mechanical keyboard. I use libre office for real work, I do development work right on the phone. I also use andronix on the phone for when I need a more full blown Linux desktop for gimp, IDEs, GIS, etc.
I’m just using a Samsung S20+. You need a Samsung if you want Dex.