Yes, Bowl. One can be supportive of trans people (want to support their right not to be discriminated against in employment, housing, want them to be able to live their lives free from the threat of violence and harrassment) without sharing their belief that "transwomen are women." Just as I would not want to see a Catholic colleague sacked for their Catholicism, but don't want to be forced to recite the Nicene creed.
Clarice is onto something upthread, by suggesting we also consider examples beyond the trans debate.
Take rape apologism, and two journalists responding to a feminist writer saying "we need to reduce the burden of proof in rape cases from 'beyond reasonable doubt' to 'balance of probabilities.'"
One says "I totally agree that low conviction rates are a scandal, but the risk to the justice system as a whole, and the risk of (a) false convictions and (b) criminal proceedings being used to 'fit people up' is too great". Not a handmaiden.
Second says "I fear for my sons, growing up in an environment where a hand on an arse will result in some hussy fitting them up for rape..." - in the knowledge that this woman is plenty bright enough to know that is a straw man, and to know the statistics that an individual man is actually more at risk of being raped by another man than he is of being falsely accused by a woman (she wrote only the week before about how male victims of sexual violence weren't taken seriously) - now, that's handmaidenry in action.