Not sure if this is a known thing or mentioned before or if it's a normal android/android tv thing and Im just being stupid but, My 2 year old played with the mibox remote and by clicking on random things unlocked a developer option under preferences. In here you can toggle on/off cpu usage overlay, limit background app processes, set hdmi optimization, toggle on/off debugging etc just to name a few.
I went to my second mibox and figured out the way she accidentally did this was : go to settings, then under device go to about, then scroll down to where it says “build”, then while build is highlighted, click the “confirm” button (middle of circle) on remote 5 times. A pop up comes up that says “you are now a developer”. Go back to settings menu and look under preferences right at the end next to accessibility there is now a new option called “developer options”.
Again, Im sure this is a known thing?