(i might be 2 years late but who cares)
Normally on openos when you connect 2 screens it's not going to display content like how would you expect on a real computer
You have to make a program that will display stuff on the second screen
I have made a sample program here that it will search for all the screens make you choose one and it will draw a dark-blue background with Hello world text on top (works best on tier 3 gpu and screen but can also work on whatever tier you want) it requires only 1 gpu
Feel free to modify it to your liking like making a terminal a gui ect but just to let
