How Lesbian is Lesbian Enough?

I love lesbian fiction. I mean, that's obvious; I review lesbian books! It's important to me that lesbian fiction, especially romance, exists. I need to see happy stories about women who love women, along with less happy stories, and stories about other people entirely. I just finished writing a novel about two queer women who fall in love, and I'm about to submit to publishers.

But I'm worried it's not lesbian enough.

Why? Because one of the main characters identifies as a lesbian, but the other identifies as queer though she's dated women exclusively. But mostly because there's a threesome in this book that includes a person who's nonbinary. It's a scene I really like and I'm really proud of. I wouldn't be willing to take it out or to change the character's gender. So I wonder if I should submit to a lesbian publisher--one that's produced books I like and that I respect--or go a different route. Is this story lesbian enough for a lesbian publisher?

I'm a queer femme, and while I feel that "lesbian" sometimes fits me, it also sometimes does not (though that's a topic for another day). I think a love story between two queer women belongs with lesbian books, even if not every experience those characters have fits so neatly into to the "f4f" category. I guess there's no harm in submitting it, but I think I better research queer publishers as well as lesbian ones. And maybe I should look into self-publishing too, though that seems daunting for the first novel I put into the world. I'm trying to be prepared for rejection even as I hope for the best.