That’s a thin ice you’re walking here… Some people appreciate the support, some people don’t like when work contacts get into their personal feelings territory.
It’s highly dependent on how close your interpersonal relationship is with co-worker, what I’d avoid for sure is suddenly closing the distance just because you know he is trans and you can tell recent events are affecting him.
It’s been production-ready for a while, Valve is known to use it for long time. Official release is more for API and ABI stability so you don’t have to change anything to upgrade.