Just so everyone knows, That is NOT Cin Drallig. It's not his saber. He was somewhere else trying to fight off Vader/Anakin as shown on the security footage in ROTS. Also I realized Grogu and Boba have not shared a scene. He has not seen Boba Fett's face or heard his voice. If he ever did I think it would be triggering for him.
It's just sad some of them didn't know who's Appo, you can actually see the arrow on his helmet, but it's actually contradict to the actual Cmdr Appo we saw on ROTS.