Er, except lots of non-genderists are lesbian and gay.
Many, many ex-Stonewall members (including at least one founder and their former lawyer)
Glinner's fellow youtuber and outspoken non-genderist ArtyMorty is gay
Mr Menno is gay
James Dreyfus is gay
LGB Alliance: set up by lesbians, a number of whom were instrumental in the fight for gay rights back in the day
A great many women from A Woman's Place are lesbian
Julie Bindel: lesbian
The late, great Magdalen Berns was lesbian
Kathleen Stock is lesbian
All of Get the L Out, obviously, lesbian
And those are just some examples. Lots of non-well-known lesbians I know personally who are not at all cool with this or the blatant lesbophobia and hatred directed against them, particularly with regard to misogynist idiots actually protesting against lesbians being permitted to have lesbian-only meetings, for instance.
Many of us objecting to the misogyny are lesbian and/or longstanding feminists (of the old school, i.e. who understand the history of women's rights, know material reality matters, and know what both misogyny and patriarchy are)
What sexuality is Martina Navratilova, btw?