Huh. Never was a fan of the non-'canon' pairings in LL animeverse but I don't know much of the game or manga. I've seen a decent amount - not much but enough for pondering - of Nico x Nozomi scattered around, so is that a thing in those other universes?
Not that there's any inherent problem with shipping characters without any significant evidence.
None of the pairings in Love Live is canon though xd (probs except for NozoEli cuz obvious reasons)