The only criteria required to become is transwoman is to be a man. Women cannot be transwomen.
You have repeated your preferred pronouns more than once on this thread. You can choose how to describe yourself and some people may, out of courtesy or fear go along with it. But you can’t force anyone else to use your preferred pronouns.
It doesn’t matter how many studies you post, human beings, like all mammals, are a sexually dimorphic species.
There are two distinct categories male and female. These two categories are required to continue the species. How an individual feels doesn't negate material reality.
For most purposes is doesn't matter what sex you are (which is what the feminists you referred to in your OP were trying to explain).
But for a few things, it is important to know whether someone is male or female (for example health) and for a few more things we keep men and women separate for safety, dignity and privacy.
Women are statistically at risk from men.
All men.
Even harmless men, even good men, even men who think they are women, even men who think they “exist outwith the binary”.
So transwomen should not be in any female only space.
The reason certain spaces, buildings and organisations are female only is because toilets, prisons, hospitals, refuges, group therapy sessions are places were women are especially vulnerable to harm from men (all men)
Women understand why transwomen want to be allowed, even welcomed into these spaces.
But Transwomen are men, so they are categorically not allowed, and will never be welcomed. (Silence is not consent)