Count me among those who consider Star Trek: The Animated Series canon to the Classic Timeline. Many of the same people were involved in the writing, certain elements were treated as canon by novels and comics as well as the show itself, and the stories are as good and bad as the original series as filtered through the limitation of Saturday morning standards and practices. Here are some interesting facts about the series you may or may not know.
(Besides, I’d rather watch this than Lower Decks or that Prodigy thing any day. One only has Starfleet dressing and the other doesn’t appear at this time to even have that much.)