Can I use Display on ROCK Pi S?

Can I use a big TV Display or any HDMI/VGA displays
on ROCK Pi S?

No.
The Rockpi S and E models have no HDMI interface. VGA is no more supported on any single board computer.

If you need a GUI on the Rockpi S, see


But that means you need a full computer to display what happens on the Rockpi S.