Be a Pro - 1 step forward, 2 steps back.
In NHL 21 you cannot play in the CHL (Canadian Hockey League, WHL, OHL, QMJHL) for a full season prior to your draft year. In NHL 20, you could make a player on a team in the say WHL, play your draft year in juniors and be drafted in the following year. Now, if you make player in the WHL and you only get to start off in the memorial cup, and you get drafted 1st overall (with Draft set to Authentic) by the New York Rangers, there are now two 2020 1st overall players on the team. If you simulate through the memorial cup (or CHL Europe Tournament) you still get drafted by a team. If you simulate through the pre-season of your NHL team, with the BAP sim penalty on, you still make the team, if you continue to sim say the first month of the regular season, and don't keep any performance promises, you may get scratched, but you don't get sent down to the AHL, or back to juniors. I take it you can't play a full season in the CHL or AHL or a European League?