99% of recruitment, at least from what I’ve seen on MG-Alliance, is done either in public (bunch of folks from a guild standing around ICly recruiting for their guild, which is cool) or via Discord servers. I’ve also had some luck using the guild finder, but I think the time of easily finding exactly what you’re looking for OOCly in game is a fading thing.
I think WoW has been around long enough that the community is much deeper into settling into various, relatively insular communities.
I peeked into WyrA recently and saw some guilds recruiting in /gen. However, they were huge ones so I wasn’t too interested - that said, I did have luck with the guild finder on WyrA horde, but it required some Discord-ing.
If you haven’t had much luck, or haven’t really been digging into the Discord communities, I would highly suggest giving it a go. The times are a-chaingin’ and whatnot. There are still excellent RP communities out there- the selection is somewhat more limited since there just aren’t as many people around anymore, but they’re there. It just takes a little bit more digging. Is there anything in particular you’rel ooking for? I can try to point you in the right direction.