Inquiry about some CC dont show up?

The CASPart resource got a new version number in the December patch, so it's possible that any CAS CC made since S4S updated for CASPart version 44 might not work in game versions that are still using CASPart version 43, because the game might see that the version number is higher than the one it's using and just ignore those items when actually loading things into CAS and displaying them. Not sure if it does something like that, can't easily test it. Even if it doesn't screen for higher version numbers, recently made skintones and makeup are especially likely not to work in older game versions due to the changes in the latest patch.

Version 1.63 of the game is also 7 months and 6 game versions old by now, and most sites and modders won't support game versions that old for several different reasons, one of which is that the majority of people whose game version is that out of date are running pirated copies.

Updating your game from version 1.63 to version 1.69 will mean that you need to update some of the custom content you already had in your game to account for changes made since last June, but a lot of that can actually be done with a few clicks in S4S through batchfixes.