... So WKX/ZZS fit your criteria, but don't count because reasons? Because they have those scenes as well, not the fake-relationship and wedding-scene, but they're given a lot of other romantic tropes to make it very clear that they're meant to be a romance. Like the boys from LIMTAW don't kiss either and that wedding scene is given plausible deniability within the show in the same way these BL show do to skirt past the censors.

You want to insist WXK/ZZS aren't romantic then that's your prerogative, but a very weird one given that they hit what you're saying they should have.