Certainly seems possible. I would have thought it unlikely since they scaled the levels with the updates, and 20+ is a Epic play.
I saw a similar one for Lvl 21 Naomlen but now it is gone so maybe a glitch that is being fixed. Obviously they would have to change the way renknown works since currently can’t make any progress once you get to Level 20.
That’s the DND standard with 20 being the highest possible level without going to Epic play. Maybe just a typo.