WARNING: Spoilers ahead (DUH!)
For some reason The Sims 4 Get Together didn’t bring any new achievements to the table even though the clubs feature had so many potential to encourage simmers to get their clubs out and explore the new achievements.
The Sims 4 City Living only comes with one new hidden achievement that basically encourages you to explore the city for the new monuments.
To unlock this achievement, you’ll have to view every single monument that’s been placed in Myshuno Meadows neighborhood in San Myshuno.
To help you out find all of the monuments I’ve circled their location in the image below:
The View All Myshuno Meadows’ Sculptures achievement can now be found in the Achievements panel!
It seems to me that it had been mentioned in the official stream before the EP was released.