RT was never banned in Russia (well before the EU decision at least). It was never allowed to broadcast because it would have to get a German TV license. I didn't get one instead it good some from Lichtenstein (?) for broadcasting which is just not how that works.
No minister or administrator made a decision to deny RT some license. All they did is to enforce in an indiscriminate manner German law. Other stations which broadcast without license would also be treated in the same way.