Here on Paizo, we only see PFS, PFS 2, SFS, and card games.
I know there is also 5th edition adventures league, but you rarely see that on Paizo.
There are hundreds of other d20 games out there, and even other settings? Most of these probably not, but I'd thought I'd ask anyway, whether found online or in person. Just because you have never heard of an organized play for X, doesn't mean there isn't one, but it is also hard to disprove a negative. The likelihood though of many of these things are very unlikely.
1. Roll20? Does this have an organized play in person or online? What websites have this? I don't know about campaign books for this, so I think most of what people run is homebrew.
2. Unearthed Arcana? Does this have an organized play and where can I find this? I was told some exist in Florida, but what about online?
3. Game of thrones setting? Organized play there? Not really care for this, but it'd be interesting.
4. Skyrim or other famous video game setting organized plays? I don't see how that would work, and not really interested, but you never know.
5. Narnia? This would be okay at best
6. Middle-Earth? I know there are 5e campaign books for Middle-Earth, so campaign books exist, but organized play are less likely. Another question is there any Pathfinder/version 2 conversions of these campaign books?
7. Neo-Classical Geek Revival is fairly new and has campaigns, no older than three years old, anything organized play for that?
8. Dark Crystal-Age of Resistance? Man I'd love to see an organized play for that. I doubt we're that lucky. I doubt there are even any campaign books for that, even if they are 3rd party.
9. Final Fantasy organized play? I've never seen anything final fantasy on tabletop, even while googling it.
At some point during the Earthdawn Fourth Edition Kickstarter a few years back, they announced plans for an organized play campaign, and produced a very small number of adventures for it. (My wife was the one who backed it, not me, so I don't know more details than that, sorry.) I have no idea if that ever got any traction at all, or if more than 3-4 (?) adventures were ever produced for it.
13th Age, Arcanis, Numenera, Chronicles for Vampire, SFS, Stargate: Phoenix Site, Star Trek: Adventures, not to mention the various WoD LARP organizations.