Very likely, if a sitting president objects to any particular Secret Service agent, they get reassigned. But Trump no longer has that office. So I doubt very much he even gets that option. I'm very sure his current SS security crew is ready to hold him for arrest at a moment's notice, prevent him from boarding a plane , boat, or car without them, etc. It's going to be very boring to have to guard him in prison, but they will do it. That's the job.

Educating anyone benefits everyone.