The coding aspect is indeed boring, but as you probably already know that is a very small part of the time a software engineer spends trying to solve a problem. I like watching streams for people trying to build software mostly for for the problem solving and to see how other people think through problems. It’s also interesting to see what people’s process looks like, which is not possible when you just see the final result (ie open source or pull/merge requests).

Twitch has now a category “Software and Game development” which is an interesting rabbit hole. Of course not every streamer is great and not everyone will like the same things, so instead of pitching the ones I like I’d suggest check out a couple of them and see which style you prefer.