I'm "friends" on FB with a number of Marines, most of whom post a ton of conservative stuff. Much of it is memes that are misleading or just false, but it comes through, and then they comment on it for a while. I'm also on with a number of baseball players who do the same thing, a couple of them are quite conservative. They light it up, and it goes through.
I also have liberal 'friends" who post stuff, of late it's mostly been about Project 2025. If I note an inaccuracy in something, that goes through, though expectedly it has no impact on the liberals even if I use liberal sources for the facts.
I occasionally post a political topic myself, probably half are left leaning and half are right leaning, just to stir pots. They all go through except the aforementioned pair which weren't in my mind political at all.
I know they use some algorithms to reject posts, and their programming is really weird and not good.