How to move AF box individually with multiple cameras?

So! Currently testing 4 Canon Rebel SL3 on one tripod, all aiming at me. While on the “Cameras” view in the “Capture” Tab and live view turn on, I can only move one AF box in the top right camera screen box, and it moves the rest of the 3 cameras AF box as well and not in sync to each other.

When I try to adjust the AF box on the other cameras, the AF box wont move to the new position I dragged it to and snaps back to the original location.

How can I adjust each individual AF box for each cameras WITHOUT doing it 1 at a time in “Single” Active Camera mode?

How can I adjust each individual AF box for each cameras WITHOUT doing it 1 at a time in “Single” Active Camera mode?

No, its not possible right now.
I’ll put this on the todo list!