I guess we can agree on that you are probably not getting into the NADA system, if your fed. has not released you, which obviously has not taken place. DEU at the moment has probably a hand full of work with the Droyzen accusations.Okay, I am no specialist in this topic; but I know at least of athletes being part of no national team at all who had to sign up into some pool to get tested in case they qualify for Universiade (in that particular case).
On another example, there is a former sprinter, injured 3yrs, lost any team fundin, no part of team again and is still getting tested (according to IG).
But yeah, I think we 2 won't find all answers to this; as usual, there might be some exceptions.
(very shocking for german correct bureaucracy though )