Ok, the quest should have started not very long after if you completed every fights previsouly.
I didn't reach this point in 2.0 so I don't know (I generally postpone these fights for the very end of the game when I have a good amount of powerful cyberwares).
You don't use mods? Never used on this save, even if mods are disabled now?
Try to verify the game files in case, but I doubt
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Anyway I suggest to contact the support directly (at least to keep them aware about the issue) because I'm not sure how you could trigger the quest while I think, it already should be available.
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