Solved
New intro screen: no custom content?
So having gone into and out of the game a few times, saved a few times, having re-enabled custom content, it seems custom hair and/or custom clothes do not show on the intro screen? So I end up with ...
Try deleting the cache files and see if that helps
https://sims4.crinrict.com/eng/2014/09/delete-cache-files/
