Research at the university of Minnesota found that 38% of transwomen are bisexual, 35% are attracted to women and 27% are attracted to men. This means that 73% of transwomen are sexually attracted to women. Given that we know that 80% of transwomen have a penis, the arguments for banning transwomen from women-only spaces remain very strong and coherent.
I can't consider someone who still has a penis any sort of woman. They're essentially a transvestite, though possibly with added hormones, even breast implants. If a man suffers from sex dysphoria to the extent that he'll have genital surgery then, on a personal level, I give them kudos, i.e. I take their claim seriously. Still don't want them in my changing room.