Why scenes are deleted?

Reasons for removal. Scenes are often removed from films at the request of a studio or network, or to reduce running time or to improve narrative flow.

Are deleted Clone Wars scenes canon?

Thanks to The Book of Boba Fett’s final episode, a deleted arc of The Clone Wars animated series has been made canon, becoming further integrated into the official Star Wars history thanks to a duel between gunslinger Cad Bane and Fett himself.