Chanel won't ever re-do the same exact colors for an item twice.
In 21P, Cfs and Coco Handles were NB365 so they will never release Cfs and Coco Handles in NB365 ever again.
The popularity of NB365 meant they could only bring the colorway back in a type of item that was never previously that color in the history of that item. This meant C19s and Le Boys could be released in NB365. They will never release Cfs and Coco Handle in the same color as in a previous season.
Hope this helps. Sorry if it disappoints you.
Just to clarify, NB365 was in fact offered in the 19 bag for 21P. And it’s being offered now in 21K, too.
I’ve always been told that Chanel does not repeat colors, too. But, as we’re seeing in 21K, it really does seem to be pretty close to 21P.