Does Auto-Green work on fades?

Yes. Fades have their own pages instead of using the standstill value. Left Fade fires on R2 + tap L1 and defaults to 870 ms. Right Fade fires on R2 + R3 and defaults to 820 ms; yew runs 900.

The standstill Auto-Green (R3 click) only works with the left stick inside the centre, so it will not catch a moving fade on its own. Turn on the fade pages you use and tune each value separately with the early/late rule.

If Turbo Fades is On, R2 + a fade uses the turbo hold windows (a 727–823 ms band) instead of the standing value. If Insta-Stop keeps cancelling your fades, turn it Off or switch it to Left-Trigger mode.

Source: yew2K mod menu; yew's published settings.