I'm not sure about an existing community. There were 2 LS's floating around awhile ago but I haven't seen any call-outs lately. There definitely are LGBTQs around (I can think of 10+ easily off the top of my head). It's probably just getting to know more people on the server outside of your FC. All of the people I've met don't straight up announce that they are LGBTQ off the bat (except for 1, ha ). Out of the ones I know as well, we aren't really interested in an LGBTQ community because we feel fine in just...the regular community, whatever that is :P

I'm not saying to not make an LS though - Lamia is a big server so I'm sure there will be interest. Just my 2 cents. Good luck! o/