Just 19 years after the events of “The Rescue,” Grogu wouldn’t even be 100. The academy existed until about 28 ABY, at which point Ben destroyed it and became Kylo Ren.
Meanwhile, The Force Awakens takes place in 34 ABY, and Ben Solo was born in 5 ABY. The Mandalorian takes place in 9 ABY (After the Battle of Yavin). But there’s a lot of time between The Mandalorian and anything we’ve seen elsewhere.
In the years immediately after Return of the Jedi, Luke is busy learning all he can about the old Jedi Order and building his own academy, the same one we’ll see burning in flashbacks throughout the Sequel Trilogy and the comic book miniseries The Rise of Kylo Ren by Charles Soule and Will Sliney. Thanks to the season 2 finale, “The Rescue,” we now know that Luke Skywalker does indeed take Grogu as his student to be trained in the ways of the Force.