Pregnancy is a protected characteristic. Women have specific rights based on this. Women can exclude men from specific services such as rape crisis centres.
Sex is real and it matters. It’s no myth.
The entire GC/TERF movement is premised on the myth that women can have 'sex based rights'
But that's not how our legal systems actually work.
It goes both ways; any type of 'biological sex based rights' for women would apply equally to men.