Extraordinary claims demand extraordinary evidence. Bisexuals exist and aren't always obvious, so "absent evidence to the contrary, that person might be bisexual" is not an extraordinary claim — hell, assuming similar prevalence of bisexuality then as we see now, which is arguably the lower bound given the cultural changes depicted, it's statistically improbable that there wouldn't be at least one non-straight person in the main cast.

If you've not noticed garak and Bashir.... well, it's worth a rewatch just for that.

While she kissed a girl, it was never portrayed as a lesbian relationship

That's what I told grandma when she walked in on me and Jenny Davis

Dang I know he was just a simple tailor but such shade as to ignore him entirely?

Did Bashir ever pine after a guy? O’Brien doesn’t count.

Lmao yeah lets just throw away evidence.

Their genders were never a consideration as an obstacle either, though.

So while neither might have been gay or even bi... I'd give more credence to poly over anything. "Whatever works!"

Did Bashir ever pine after a guy? O’Brien doesn’t count.

Did O'Brien ever pine after a girl? Kieko doesn’t count.

rather the post reincarnation resumption of earlier straight marriage.

That makes it trans, which still counts.

Does William Travis or Davey Crocket count?

Any character that does not explicitly say they were hetero/homosexual is canonically bi until proven otherwise.