I believe there is nothing available like this. I understand what you are looking for although I will keep looking for your sake. Supervisors generally will respond to higher priority callouts no matter what(such as a fight in progress or along those lines). Otherwise depending on what type of officer the supervisor is they will only respond to calls when a supervisor is requested meaning that patrol officers will take the call firsthand but then later on supervisors will show up if wanted/needed.
Now a few callouts here that could possibly resemble that a supervisor that would respond to.
Now this callout plugin here has one particular call that is "Assistance Required" you are dispatched to a hit and run, you respond, officers and EMS will already be on seen. They need assistance in locating the suspects car involved by going to a few different addresses that dispatch has given you after running some plate numbers that was given to you by the victim.
Code 3 Callouts -
Now there are various callouts within this plugin, around 10. For your case in particular, one of them stick out for the "Supervisor" role you are looking for. This callout that I'm point out is the "Backup Required" on a domestic. Two officers have responded to the scene of a domestic disturbance, and they have requested another unit back the up…that’s you. Respond Code 2 to the scene, and assist your fellow officers with whatever they need. You might not have to do anything…or you may have to step i to protect a brother or sister in blue. This could be exactly what you are looking for, think of it this way. Two patrol officers are on a domestic and they need another unit, and that's you, the supervisor. Respond and provide your assistance as requested.
Me personally I have never tried this pack of callouts but one sticks out, use this at your own discretion because I don't really know what it brings. Although one stuck out and it is the "Officer needs help" callout. This pack kind of looks interesting and I think I will give it a shot. Once again not sure what that call brings so give it a shot.
I am still doing some research but this should give you an idea to start off. I will keep looking but as you know there are quite a few of callout plugins. Anyways, hope this helps!