Hi everyone! Thanks for your feedback! I found a different pages that address this issue and here is what I found in case anyone else needs this information!
THE FOLLOWING ARE LOCATIONS THAT HAVE MANUAL FLUSH TOILETS!
Magic Kingdom
AAA Kiosk on Main Street, U.S.A. (South of City Hall)
Plaza Pavillion
Tiki Room
Hungry Bear Restaurant (not urinals)
Matterhorn Way/Path to Alice (not urinals)
Village Haus (not urinals)
Big Thunder BBQ
Tom Sawyer's Island - Mill Dock
Tom Sawyer's Island – Fort
Adventureland: Pirates of the Caribbean: located near the ride exit.
Frontierland: Splash Mountain, near the ride exit, under the railroad depot.
Fantasyland: Castle: Cinderella's Royal Table restaurant lower level.
Fantasyland: Rapunzel's rest area between It's A Small World and the Haunted Mansion..
Storybook Circus: Walt Disney Railroad Train Station restrooms.
Epcot-In the Odyssey center just before World Showcase. (baby care centers)
• Spaceship Earth East: After you enter the park on the left-hand side of Spaceship Earth
• In Future World West, across from The Land.
• In Future World East, across from Test Track.
• Showcase Plaza Refreshment Port: On the right, before Canada.
• To the right of American Adventure theater.
• To the right of Germany.
• In Norway, across from the Viking ship.
Hollywood Studios: All toilets are auto-flush except for the ones located at the stroller rental area near the park entrance.
Animal Kingdom
• In Discovery Island, across from Flame Tree Barbecue near the bridge before crossing into Dinoland.
• In Discovery Island at the First Aid center
• In Dinoland next to Chester and Hester's Dinosaur Treasures
• Between Everest and Kali River Rapids in Asia
• In Asia on the left before the entrance to Maharajah Jungle Trek
• In Asia inside the Maharajah Jungle Trek as you exit the Bat House.
• At Rafki's Planet Watch at the conservation station.
• In Africa near the Mombasa Marketplace
• In Africa at the Harambe Theater restrooms
• In Pandora on the left past the merchandise kiosk
• In Pandora between the Pongu Pongu beverage kisok and the Satu'li Canteen