I came across this software? Has anyone used it?
Epoptes ( a Greek word for overseer) is an open source computer lab management and monitoring tool. It allows for screen broadcasting and monitoring, remote command execution, message sending, imposing restrictions like screen locking or sound muting the clients and much more!
It claims it supports NX/ no-machine which means it would run on Android? I can’t imagine the more advanced functionality would work.
Another alternative is https://veyon.io/ who are working on an Android client
Veyon seems the more capable bit of software after having a quick look at both of them.