So I played two matches of Aghanim's Labyrinth with my friends and we did not get any rewards. We did not get the next level, we did not unlock the other version of Aghanim, and we did not get the shards for upgrades. Do you need battle pass to get all of these? Don't know if this is a bug or intended.
Source: https://www.reddit.com/r/DotA2/comments/rhcuj6/aghanims_labyrinth_not_updating/