Your example doesn't make any sense since Sleeping Beauty takes place in France which doesn't have any connection to Animal Kingdom. Encanto "having animals in the film" isn't the reason why Encanto is a good fit. The characters live in Colombia, a South American country that's so rich in agriculture, it's landscape, and has a vast species of animals. All of South America ("Tropical Americas") has so much to explore that aligns with Animal Kingdom's mission.
China has a vast species of animals and an incredibly landscape. That doesn't mean they should add a
Mulan ride to Animal Kingdom.
Using the characters of Encanto is one way to teach us about all of it.
Do you really expect Disney to build an
Encanto ride that teaches people about animals? They could've had the Nemo ride in the Living Seas teach parkgoers about fish, but they didn't. They could've used the
Ratatouille ride to teach parkgoers about France, but they didn't. They could've used the Guardians of the Galaxy ride to teach parkgoers about energy like the ride it was replacing, but they didn't. Disney doesn't do "edutainment" anymore, I see no reason to believe they'd do it here.
If you have to go "Well, the characters in this franchise CAN be used to teach us about animals", maybe it's not as great a fit for Animal Kingdom as everyone thinks it is.
For many years now Disney has been trying to stray away from book report rides and retelling the story of films on their attractions. As a sort of compromise to the IP mandate, many Imagineers would rather write a new story for these universes and characters instead of regurgitating what Hollywood has already put out. This is why we got Batuu instead of Tatooine; it's why Pandora, FEA, and Tiana's are all set years after their respective films.
Frozen Ever After takes place after
Frozen, but it still repeats many of the film's plot elements. Anna says "They were born ready!" at one point for no reason other than because she says something similar in the movie. Elsa is in her ice palace singing "Let It Go" for no reason other than because it's the most popular song from the movie. Olaf sings "In Summer" with all of the same lyrics from the movie for no reason other than because it's a song from the movie. The trolls appear simply because they were in the movie. Anna and Elsa randomly wear their
Frozen Fever outfits for no reason other than because hey, people liked
Frozen Fever, right?
As for Tiana's Bayou Adventure, it's obvious the only reason they're having it take place after the film is because people always complain about how Tiana is a frog for most of the movie and they want her to be human throughout the ride.
Y'know what's funny? When they wanted to put
Moana in Animal Kingdom and I pointed out that it didn't fit in Animal Kingdom because, like
Encanto, it is not about animals, others on here were claiming "Animal Kingdom's theme isn't actually animals, it's conservation". And yet here we have people insisting that an
Encanto ride could be about animals because there's a minor character in the movie with a lot of animals. If Animal Kingdom's theme is actually conservation and not animals, doesn't that mean
Encanto still doesn't fit? Or will the attraction actually have Mirabel going all
Lorax and lecturing us about saving the rainforest?