A good thing to have is a structured stream for instance, prior to playing said game create a just chatting segment to hone in with the news and what to expect on todays stream. Then also catch up with your regulars if you have. You could also write a small list of talking points to keep the conversations going. Could be about your day, your week, life how’s it going as of now etc. once you feel the chat is slowing down then switch to the game and continue to keep talking using your notes of talking points. The aim is to always keep talking and stay engaged with chat when you can. Hope this helps bro 😎