I also subscribe as gender queer
There is definitely a space on the Lenormand market for lgbt decks and decks which shake up traditional gender, although some decks have multiple male and female and people cards to cover everyone
I know what you mean about this isn't about relationship reading though.
first suggestion, what about designing a lenormand with no people? this is tricky unlike the wild unknown tarot and other decks where conventional symbols and people are removed. How can you have a gentleman and lady card for the lenormand system? Wild Unknown has animals for the court card people, but maybe some art can represent masculine or feminine energy? male or female symbol?
second suggestion, what about gender neutral people or a man and female card included and two people that you cannot work out their gender. a soft feminine face but maybe in a suit.
third suggestion, one gender neutral card representing the person having the reading and another card representing a person they are interested in / significant other. That does away with the man / lady but keeps the positions.
just some ideas
tricky though!
ETA: thinking about this some more, gender queer is a spectrum and people can non conform to gender or be androgynous or dress as a different gender to their birth sex or challenge gender assumptions. This is tricky to represent. I think making a variety of different "people" cards could solve this, not just man and woman, but different characters.