I keep this list curated, so I confirm these people are doing mostly coding streams - and in future steps, I'd like to add more platforms :)
I started out last week with like five people, and only twitch people kept writing me so far :)
It's a good discovery tool. I actually searched for devs doing live coding in twitch few days back but barely found anyone.
I find list useful, I was trying to find such streams earlier with no luck. Unfortunately I only found 2 dead accounts by searching for programming, maybe it is just I am not that familiar with twitch.
Here [0] is a list of currently live streams who have categorized their stream as programming. At time of writing, there's about 50 live streams.