Note: I'm writing from an American perspective - sorry if this doesn't apply to your situation.

I know this is literally a 3 month old post but: I'm a transman programmer. I'm still at the job I initially came out at, and things are great - everyone uses my correct name and pronouns. It's been two years since I came out at work and I've been here seven years. Higher Ed seems to be a very good place for transpeople right now, particularly private sector higher ed. Public higher ed can be dicey depending on your state - there's talks of banning transpeople from working with children in my state, but that would only apply to public.

The other posters already covered a lot of reasons you might not see a lot of visible FTM men in tech, but an additional one is that our...uh...background tends to push people like us away from tech. At least in the US, there's still a major gender gap in how science and especially tech are taught. I was lucky to get into a lot of girl exclusive science camps, which helped prepare me for being the only "girl" in non-gender-specific camps. I was the only person of my gender to attend the robotics camp that launched my love of programming for the 6 years I attended, and once I hit college, there were only two girls (including me) in my entire computer science program. Then you figure that a small percentage of AFAB people end up being transmen, and we end up being a minority of a minority.

Additionally, anecdotally, at least in my area, FTM individuals tend to be poorer and/or from poorer families than MTF individuals. That can lead to a big gap in professionals, because it can take a lot of money, sanity and support to get started.

I don't think any of those are reasons to be scared of going into tech - it's not like it's an awful death trap and that's why everyone avoids it. It's just a leftover product of societal norms that are slowly changing.