I don’t know about commentary. It might be worth asking on reddit: /r/baduk/ or /r/cbaduk/ to see if anybody knows of an individual who commentates AI vs AI games. It seems likely there is somebody out there playing LZ and commentating their own games, but I haven’t come across it in my travels yet.
In regards to seeing LZ 9x9 games with AI vs AI, you can definitely find some at CGOS. These are bots of all types there and they all face one another. To find LZ vs LZ matches, look for LZ, Leelaz, or a name where those letters appear inside the title. Click on that user to see games they play. Then look their opponents for other LZ or Leelaz bots. These will be Leela Zero vs Leela Zero games.
Several different people are training 9x9 weights. I have never been interested in watching AI vs AI matches. Mainly because I don’t yet have the skill to play in the manner that they jump around. That style of play blows my mind, because I simply cannot follow the reasoning for it yet. Then again I’m still getting comfortable identifying Sente and Gote a lot of the time. Well, not so much identifying it as keeping it in mind as I play 
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