@fourbedwinner
If you are genuinely interested in reading, can I suggest that you read the following books:
Trans by Helen Joyce
Material Girls by Kathleen Stock
Irreversible Damage by Abigail Shier
I also recommend the following video content:
Adult Human Female documentary (that had to be cancelled from screening mulitple times due to mostly intimidating male people with transgender identities blocking entry for women to watch the screening)
Behind the Looking Glass - a documentary with the real life voices of women who have been greatly harmed by their husbands who declared they were women.
If you want to see the evidence that no male person who has been through puberty loses their pubertal physical advantage, here is a thread with all the evidence that I have been able to pull together. Genuinely, no male person is a woman. And when women need single sex spaces, it is also because female people have greater likelihood of fighting off and escaping a female attacker, but when you consider that even a weak man has more strength than 90+% of all female people, the understanding should be falling into place.
https://www.mumsnet.com/talk/womens_rights/5142027-save-female-sports-evidence-thread?page=1
Yes, there is great harm to female people by treating any male as if they were female when they are male. Calling an individual male person a 'woman' has already been shown to cause collective harm to female people as well as individual harm.
The inclusion of one male person in a space, a sport, a job role specifying a female person, etc, causes harm typically to many more than one female person.