As a sort-of developer myself (mostly network automation tools and backend things), it's not something I'd really share publicly. Not because of shame, or even worries of safety. Just because I don't really share my code or projects with the public anymore. I haven't worked on open source software in a long time. I wish I still could, but it's not in the cards for me. Most of my "a bit idle" time has unfortunately gone into obsession over "perfecting" my transition. We'll see if therapy helps there, but I honestly think it would just shift to life planning endeavors instead.
That said, maybe look at this with a different lens: while it would be good to band together and write our own things, software doesn't have a gender. Find projects that help with things you believe are worth doing. Sometimes it's tools to help the transgender community directly (https://github.com/cvyl/awesome-transgender could use some updating here!) and sometimes it's just making the world a better place for humans to be kind and helpful to each other.
I get the desire for community, though. I've posted about this myself, but it's very difficult to find people that "get it" who aren't already trans or questioning. I'd love a circle of friends to relate with. The software world can be pretty socially closed off, sometimes!