I guess it depends, the manager asked you to separate yourselves from each other. I don’t know what that means - it sounds more than a spontaneous hug and a kiss. I don’t particularly like public affection but then I’m not an affectionate person in public. That applies to all flavours of humans equally and is independent of their sexuality.

I don’t police public conduct, but if I’m trying to eat then the last thing I want is the opening few scenes of a porno. I might not mind a rom-com. I think human beings (particularly adults) are generally able to sit separately, not paw at each other, and save all that stuff for private spaces. Perhaps that is joyless, perhaps that is prudish, I doubt I would complain about it - but a manager would know from my face and general demeanour I wouldn’t be happy.

What you have to decide is whether this is something aimed at the LGBTQ+ community, or whether (objectively) your group had strayed from the bounds of acceptability - not for your in-group, which may have very relaxed norms about physical affection, but for the sum of all groups in the space.