I haven't seen one yet, but that doesn't mean there isn't one hiding out there.
I also know that not as many of the Twitch streaming group has made the jump to the Fediverse due to reach, existing audiences on Twitter or Instagram because posts only show up chronologically to direct followers.
With that said, while Lemmy and Kbin are great for what they do, perhaps something more like a Calckey instance would be helpful since it allows for more ways to keep and organize information you want to refer to. I use it a lot and the ability to keep information together as well as find new information as it passes my way for something like Streaming has been more valuable and useful for me.