Yes, it is. The novelization is generally accepted as part of the official Star Wars canon.
The Revenge of the Sith novelization is indeed canon. It provides additional details and depth to the on-screen events, contributing to the rich tapestry of the Star Wars franchise's narrative.
In most cases, the Revenge of the Sith novelization is considered canon. It expands on the story presented in the film and is consistent with the broader Star Wars universe's established lore and continuity.