I did some procedural systems for mostly rearranging tracks and stems, but I would love to make a completely generative music but it's a lot of work and that can be hard for a jam. Maybe next time ? I will try to get better with the tools before. I made a music once for a small tactical game where the stems are linked to what character is in your team, it sounds a bit like what you describes.
I used FMOD for integrating in this game, I have worked mostly with Wwise before and that's really nice for adaptive and generative music but it's a bit hard to start with. What did you use for your procedural system? Native Unity/Unreal can be a pain in the ass with audio.