They want to "embolden people who menstruate regardless of gender to embrace this natural bodily function" or something like that.
The problem with that is - if they actually gave a fuck about women who identify as trans - is that any reminder of their female reproductive system worsens their dysphoria something terrible. So it comes as a great relief to gender dysphoric females when their periods stop after they start taking Testosterone.
Essentially what this means is that all this forced inclusivity triggers very many of the women and girls who suffer from gender dysphoria. I think it was Buck Angel and a few other female transsexuals who medically transitioned who firmly reject this stuff saying this only serves to other them, because men do not menstruate.
Honestly, imagine going through what transitioning female transsexuals go through to appear male, only to have these ... misguided fools remind them they will always be female.