GTR3 feedback feature

I was thinking it would be cool to have feedback on GTR3.
Don’t know all the proper terms, so please bear with me.
There has to be some physics to feedback which could be replicated and toggled on and off.
And since the monitor tends to emit a signal that goes through the pickups, maybe that could be the axis point, as if the monitor was the speaker.
Those are my brief ideas so far.
Would be open to brainstorm or discuss if possible.
Have a great day.