Can you go above level 20 in D&D beyond?

Excuse me, I'm a bit confused about the limits of the game D&D Beyond. I've been playing for a while and I've reached level 20, but I'm wondering if it's possible to go beyond that? Is there some secret mechanic or expansion pack that allows players to surpass the traditional level cap? Or is level 20 really the ultimate cap for character progression in this game? I'd appreciate any clarification you can provide.