But that's just in family packs. If packs ever need to merge, or fight for territory, or it's a lone wolf fighting for a female, they do exist and the head of a pack can be any male wolf it's just very rare. The concept of being BORN an a/b/o is ridiculous in any sense. It doesnt exist anywhere lol so that really skews the idea of what it's based off of no matter what.
Well that’s the beauty of fiction. Also why my fav genre A large part of my life was (and to some degree still is) sci-fi and fantasy (although I hated fantasy with mages and drarwes and all the rest, only Tolkien could I tolerate it. Or more like everything else written felt like a crappy copy.) Anyways while there are hierarchies in wolf packs it’s not the rigid social structure predetermined from birth that most ppl have been taught to believe.
“Wolves do not have an innate sense of rank; they are not born leaders or born followers. The "alphas" are simply what we would call in any other social group "parents." The offspring follow the parents as naturally as they would in any other species. No one has "won" a role as leader of the pack; the parents may assert dominance over the offspring by virtue of being the parents.”
“While the captive wolf studies saw unrelated adults living together in captivity, related, rather than unrelated, wolves travel together in the wild. Younger wolves do not overthrow the "alpha" to become the leader of the pack; as wolf pups grow older, they are dispersed from their parents' packs, pair off with other dispersed wolves, have pups, and thus form packs of their own.”
“Wolves (and other animals, including humans), display social dominance, he notes; it just isn't always easy to boil dominant behavior down to simple explanations. Dominant behavior and dominance relationships can be highly situational, and can vary greatly from individual to individual even within the same species. It's not the entire concept of wolves displaying social dominance that was dispelled, just the simple hierarchical pack structure.”

Everything in the omegaverse is based on the theory of wolf hierarchy, but that turned out to be faulty science that the scientist who came up with theory spent his entire life trying to get ppl to stop believing. This scientist was studying wolves in the Yellowstone nationally park. He noticed a hierarchy among the wolves and came up with the theory of alphas and so on. He wrote a book on it and it became ingrained in our culture as a fact; but as he continued to study the wolves he realized what he’d thought was a hierarchy with the strongest wolves being alpha was actually just parents. The younger wolves obeyed their parents. He pulled the book and then spent the rest of his life trying to correct the faulty science, unfortunately for him it was firmly cemented in pop culture by then. But this is fiction and yaoi so it doesn’t actually matter but it does make those dumbass fckbois and alt right wanna be nazi’s calling themselves alpha males look lame as fck.