“They exploited aliens who can change gender so it technically wasn’t gay”
Okay but, imagine this, they literally could have used a male trill for the kiss. But they did not. They used a female trill. Just because the love was left over from when Dax was male, does not make it any less LGBT representation when she still feels the love for Lenara as a woman. Love is love in the trill community, and it goes beyond gender/sex.