A few mathematicians in the UK have set up the Queer, Equality and Diversity Network for Maths. (Name chosen entirely for the acronym: QED)
https://sites.google.com/view/qednetwork/
"The QED network is a community-led effort by UK mathematicians to connect and support LGBTQIA+ members of the UK mathematics community.
The impetus to set up such a network grew out of the 2024 BAMC conference under a drive for increased UK visibility and community for queer people in the mathematics community."
They're on bluesky at https://bsky.app/profile/qedmathsnetwork.bsky.social. I'll see if I can get them over here too 🤞