Does anyone actually use dispo services when they're still buying their first deal, or is that backwards

I'm a contractor, not a wholesaler, so this whole side of the industry is new to me. But I've been doing walk-throughs for investors long enough to hear how deals move, and lately a few guys I work for keep mentioning dispo networks like they're just part of the process. I'm six months out from closing on my first buy-and-hold, probably a duplex in the 180 to 220 range in the Tacoma area, and I'm trying to figure out if any of this touches me at all or if it's purely a wholesaler tool. Like, would a buyer network ever surface me a deal that's not on MLS, or does that only work if I'm already inside the wholesale ecosystem somehow? I genuinely don't know if I'm even the right kind of buyer these services care about.