Handlebars Adjustment?

Can the handlebars on a 2020 F3-T be adjusted up or down by loosening 4 bolts?

Yes but you only have maybe 1-2 inches of adjustment. There is a slot in your handlebars and the slot goes over a pin where the handlebars mount and bolt up.

Is this true for the 2020 RTL too?

Should be..

Yes you can. Just loosen and move. However, with the T putting them forward will block your mirrors from view by the switch clusters. My solution to that was add Bar End Mirrors. Details at link in my sig.

Thinking about moving the handlebars backward toward the driver??

I tried rotating them up, but that didn't do the trick. It just hurt my back. I raised my bars 2" with Lamonster handle bar raisers. Very comfortable, now. Easy and inexpensive.