The film’s answer was Order 66, a diabolical part of Palpatine’s plan in which he would have all of the Clone Troopers who had fought with the Jedi throughout the Clone Wars suddenly turn on ...

In Grogu’s case, another Order 66 survivor, Ahmed Best’s Kelleran Beq (whose ultimate fate is unknown), was able to get him away from Coruscant in the midst of the Jedi massacre.