I also used Nova until recently. In a similar post I saw that someone mentioned Octopi Launcher, and I liked it so far. Some features that I liked in Nova are missing, but apart from that, I find it to be a good replacement for now.
TLDR: Octopi Launcher
As others have mentioned, I also use separate headphones and a microphone, mainly because I haven’t had great experiences with headsets in the past.
Right now, I’m using the Beyerdynamic DT 900 Pro X paired with a HyperX QuadCast 2, and I’ve been really happy with the setup.