if that 1-scene background character in the trans-flag shirt in that one movie counts as a canonically trans Disney character

then I submit that Kevin Flynn was a canonically queer Disney character occupying at least 4 spaces on the LGBTQ spectrum, as he had at least 4 rainbow flags in his apartment

(not to mention what exactly he DID in front of them)

Kevin Flynn walks in the door of his apartment, right after the guests he just invited in. Over the door are 4 rainbow flags, 2 in the usual rectangular shape and 2 curved like upside-down rainbows. He immediately takes off his shirt.

Shirtless, with a heated gaze, Kevin Flynn stands in front of a fifth rainbow-striped decoration of some sort, this one made up of individual sparkly pieces. Cut to one of his guests (new boyfriend of his ex-girlfriend) who has taken off his nerdy glasses and is fidgeting with the end of them near his awestruck open mouth.

Having partially put a shirt on, and with a charming smile, Kevin Flynn walks toward the camera, hand tugging down the middle of the shirt between his still-exposed pecs