Even The Sims 4 can't escape the famous and adorable Baby Yoda, or The Child as he is known on the Disney+ show, The Mandalorian. And it isn't even a mod. The little creature comes with the latest update of the game. Maxis seems to have kept this a surprise as it doesn't appear in the newest patch notes.
The Child appears as a sculpture in the game, and it can be found in the Build/Buy mode under "Sculptures." Or you can just type Baby Yoda in the search function. He's named "The Child Statue" in The Sims 4 with a description, "This statue is a lovable replica inspired by the Disney+ live-action series, The Mandalorian." Now, if we can only get him as an actual baby to adopt in the game, then that would be perfect.
Source: PC Gamer