The 20mm, 24mm, 35mm, 50mm, and 85mm S-line lenses got new firmware that allows for linear manual focus control (Z6 II, Z7 II, Z9).
Meanwhile, the Z9 firmware 3.01 fixes some autofocus and FTP issues, as well as two other minor things. One of the autofocus changes seems to stem from something I reported to Nikon (as likely did others).