well, yes! I actually made a sort of a graphic for it though I've been told it looks like an ice cream or something JSKDJDKFK
if you meant ot8 polycule as in, everyone is in a romantic/sexual relationship with each other, no not exactly. ot8 polycule to me is more to each their own thing, mostly.
I'm a huge fan of the ot5 hyung line, so to me in that regard I like to think that they all have a thing and could have multiple relationships between each other (ex: jyungtael, haobin, maettael, binneultael, jyungmaet, and so on).
I don't necessarily think romantically about every pairing, but it's a polycule where I wouldn't mind if it was, if that makes sense. for example, jyungseok and sungseok to me could be exes to deeply platonic, which is not any less of an important relationship, but I don't mind when its romantic either.
then, I also enjoy the polycule between gyub, rik and geon. and enjoy each relationship inside of it as well.
you could say I'd have 2 polycules, but I enjoy riktael a lot, and I also like maetrik, which would be the "romantic connection" between the two polycules, I guess, though I consider gyubseok and platonic gyubtael as well.
TL;RD if you look at the graphic I posted, I have my favorites, but I don't mind any possible combination between the lines, whether platonic, romantic or sexual. I think some are more one than the other, but I would consume fics and fanart of any of those lines, and platonic of everyone hehe!!