Just wanted to re-up a classic and (I hope) prescient Barracker post:
The landscape is changing. I can't say how long it will take, but people are starting to assert absolute boundaries and reject the legal and ethical principle that a person can change from male to female and vice versa.
This will not reverse. It will grow, and it will reach an inevitable conclusion. The UK is looking very likely to be the fulcrum of change, and then the balance will shift back everywhere.
You can't stop this. All you can do is look to the future. It would be in your best interests to view this short period of history where we as a society mistakenly allowed a lie to temporarily be forced upon others, as a short-lived and unsustainable 'faux-solution' to a problem. That faux solution will be replaced with something else based upon a real and ethical foundation, and society will no longer accept 'sex changes' in any way.
Your best bet is to align yourself with what is coming. That so called [legal fiction] sex changes are a finite blip in history, that they obstruct a real solution to inequality, and that they should be self limiting, and should be drawn to a close.
If you support the end of this era of forced pretending, and work with those who are ushering in a new era of real women's rights, then I think it is possible that the few individuals who have already gained legal recognition as the opposite sex will continue to be honoured as their legal status. A grandfather clause is a real possibility, one that accepts those men are a product of their time, but draws a line behind them and does perpetuate the problem further.
I think this is a concession that might be negotiated from women, perhaps, if we saw that the door was finally closing on the redefinition of women and their rights.
It's just my opinion. But this is where I think we'll end up.
Whether that grandfather clause will come to pass or not I cant know.
I know what I would do in your shoes. And it isn't doubling down on 'I'm prepared to negotiate women's own boundaries with them'. It's 'I get it. It needs to stop now. Where do I go from here' [Italics my addition for clarity.}