When you take the master mason's obligation (oath), you specifically swear not to be at any ceremony to make a woman a mason or allow it to be done if you can stop it.
This was recently in the news in the UK about whether or not to kick trannies out. Grand Lodge there decided you can stay in as long as you were a man when you were made a mason.ย So by that, technically, I guess a "woman" could be a mason but natural women can't be made one in the first place. Think the sauce for that was zerohedge or dailymail.
There are affiliated groups where female members have to be related to a mason to join. Order of the Eastern Star and Order of the Amaranth are the biggest of those organizations.ย OES is the one with the pentagram.ย Amaranth is a flower I but I've never seen them in the area where I live.
There are also affiliated groups for children of masons like Demolay for boys and Rainbow Girls international for girls. Also one called daughters of saintโฆJude? I can't remember which saint but that's another smaller offshoot they don't have in my area.
York and Scottish Rites are affiliated orgs for men where you have to be a master mason to join but are specifically NOT "masonic" organizations.
My original point being that women can't be masons in the blue lodge. They do have what they call clandestine masons but they are basically rogue groups who aren't affiliated with AFAM (Ancient Free and Accepted Masons). Another part of your master mason's oath says that you won't talk about Masonic stuff with clandestine masons or attend their lodges.
More than likely these "female masons" are OES and Amaranth members.