As a gay man myself, I wouldn't go out of my way to search for a LGBTQ+ platform, and my experience of misterbnb (suggested by @Ricardo85) wasn't a good one. There are more than enough LGBTQ+ friendly listings on Airbnb, @Sabrina954, and they're easy enough to find.
I was searching for somewhere in Barcelona. Three requests came back with "Sorry, we don't have availability" or some such, (despite their calendars showing it) and another chap was looking to offer a little more than a bed for the night, @Ricardo85.