My guess is Reddit is doing this to temporarily raise traffic. It’s like rage bait. They know they’re pissing people off and protestors will flood the site, but traffic is traffic. If they can demonstrate engagement it must be good enough for the upcoming IPO.
In addition to all of the above I recommend The Dragon Prince on Netflix, there’s a few LGBT characters on there, a couple if which play very prominent roles in later seasons. Season 4 drops off in quality a bit but it picks back up in season 5.
Star Trek Lower Decks has a bit of representation too, and you don’t need to like Star Trek to enjoy it.
The last episode of Ghost and Molly McGee nods to one of the big supporting characters being lesbian or bi.
Craig of the Creek is for younger audiences but has a bunch of lgbtq characters, including a lesbian kiss scene! It’s very good at all sorts of representation.
One of the main characters in The Great North is gay and out. It’s a fairly chill comfort show I’d say but different from the ones above.
The main protagonist of Dragon Age: Absolution is a lesbian but that’s not specifically a central part of the story.
There’s a bit of representation in Vox Machina, but be warned it’s quite violent and bloody at times. Same for Castlevania but my god that was an amazing show. There’s even a MMF sex scene, but I won’t give away much more on that.
Those are some that come to mind for now but I’m certain there’s more. Enjoy!
Edit: I just noticed you didn’t list Adventure Time. If you liked all of the cartoons you listed you -must- watch Adventure Time! There’s a wee bit of lgbt rep in there too.