It's apparently a newly vocal (yet previously existing) trend amongst trans and drag programmers, particularly of the linux variety.

I know of one transwoman and she doesn't do this, though we do work for a "business formal" environment.

Seems to be a bigger thing amongst the younger college CS and fresh out of college folk.

I personally find it a bit funny, but I also have the small bit of me that worries about the social-political climate and how it might impact their careers.

Amongst engineers I've still found an uncomfortable amount of conservatives. So even if they don't support MAGA directly, I'd imagine they still carry a lot of that bias on "what is appropriate" or not.