This scenario was driving me crazy. I have an XDR freehub and cassette that was creaking like crazy. I changed the BB, chainring bolts, put carbon paste on the seat post, etc., but nothing seemed to fix the problem. I then swapped out the XDR freehub for an HG freehub and cassette, and the creaking went away. I guess for now I'll stick with the HG setup and the XDR creaking only occurs with this one wheelset and frame.
Any suggestions on how to fix this for the future? I like having the 10t cog for those sudden quick speed burst, but I mainly prefer it to move the 11t more inboard for a straighter chain line. Thanks for any suggestions!