That feels like a bold and possibly dangerous thing to say without evidence.
How is it bold and dangerous? A decent chunk of people accused any person who criticized this person as transphobic. This has happened with other LGBT people so there is a history of this happening in the past.
The former Reddit employee in question accused the Green Party in the UK of transphobia, after they discovered she hired her own father as an election consultant, under an alias. At the time, he had been charged with rape and child abuse, and has since been convicted.
This is all public information.
Doesn't seem like the accusation stuck. And it would be very easy to point out she did it before.