Without looking, I'm sure there's a vibrant online community with lots of discussion, lots of evaluations of various vaccines, and many people not opposed to all of vaccines.
This is how nonsense works. It's only outsiders who assume a nonsense community is internally absolutist. You'll find a huge diversity of expressed opinion within, for example, QAnon, biohacking, Tim Ferriss's books of hacks, etc. There can be that diversity because no one is there to hold anyone, least of all themselves, accountable. People watch, read, and listen to a ton of content, with no one bothering to really sort it out and find the coherent and repeatable truths in there. That's not what they're there for -- they're there for the certainty, for the community, for the sense of superiority, and for the escapism.
So these communities have a high tolerance for incoherence. Anti-vaxxers aren't against any and all vaccines. Except when they are. Sure, they'll give their kid a coronavirus vaccine. They'll also repost conspiracy theories about it. They have no shame about their own intellectual rigor or hypocrisy. They are warriors fighting a battle and need ammunition, leeway, and allies. They aren't keeping score of their own intellectual consistency!
The simple fact is that coherent and repeatable truths, which stand up to scrutiny and encounter with reality, are few and far between. Those of us who insist on them know how infrequent they are, how meager and paltry. We only settle for that meal because we care so much more about reality than illusion. We'd rather eat the hardtack we made ourselves than plug into the Matrix and eat Agent Smith's filet mignon.
Of course, that's nothing new! Religion has been working this way for millenia. As soon as you separate belief from the need to be coherent, anything goes -- which means you can actually tolerate a high degree of disagreement within a cult. The guru preached celibacy? But he also just slept with my friend? I can synthesize that, no problem -- I already have my bag of nonsense from the guru in the first place.
My favorite, most straightforward example: many people who claim to believe Jesus was the most important person in the history of the universe definitely do not act like it. Most never even bother to learn what his name was. Who cares? Most aren't trying to investigate real stuff, they're just enjoying the belief, being part of the tribe, having a firm sense of purpose.