I guess it depends on what you mean by “LGBT Disney characters.”
Does Star Wars count? Because in Rogue One, Chirrut and Baze were pretty obviously gay. I don’t know anyone, gay or straight, who saw that movie and thought they were just good friends. Especially with the way their arc ended, their relationship was made about as explicit as could be expected for a pair of secondary characters.
Does Marvel count? Because they’re looking for a gay actor to play a leading role right now. That’s a pretty clear indicator that the role is that of a gay character. (Hollywood’s pattern of awarding gay and trans roles to straight and cis performers has become increasingly controversial; by looking for a gay actor Marvel would be avoiding this.)
If we’re just talking about a the animated movies, it might take a little while longer for them to feature a gay character in more than just passing. I think they’d want to “do it right” and actually portray a gay relationship rather than just have a major character have an off-screen same-sex love interest. Many Disney animated movies are fairy tales built around a romantic relationship, after all, but acknowledging that gay relationships exist is seen as more “adult” than acknowledging that straight relationships exist, for some reason. I think Disney knows it would cause a stir to have a gay or lesbian relationship in their “kid’s film.”
But times are changing. I think Disney really should know by now that they’ll never be able to satisfy the “One Million Moms” crowd. I know people who boycot Disney because of Gay Days, even though those aren’t organized by Disney. They simply wouldn’t be satisfied until Disney illegally banned gay people from the parks, which is…obviously a non-starter. So maybe it’s time Disney stop being worried about what those people think.