Using DeX with two external Monitors?

I would like to replace my desktop computer with an android phone. I only do word processing (in google docs) and internet browsing (chrome), so I figured the processing power of a new phone should be enough for that. However, I like to write on one screen, while I read pdfs or research websites on another screen. I have two HDMI monitors. Can I use Samsung DeX or android desktop mode for this? What should I look out for, when buying a phone or a suitable docking station? (I haven't seen ones with two HDMIs yet)