Thank you for your feedback During the Character Creator 3 installation, the installer will auto copy morph sliders from the Character Creator 2 Template / Custom folder into the corresponding Character Creator 3 folder location. Other content type like Cloth, Hair, Project, and others, can be manually dragged from the Character Creator 2 folder --or-- manually copied from previous Character Creator versions into the corresponding Character Creator 3 folder location. Please find more details here: https://kb.reallusion.com/Product/52718/How-to-import-previous-version-content-into-Character-Creator-3 Reallusion
Isn't this a duplicate of Issue 5189 <https://www.reallusion.com/FeedBackTracker/Issue/CC2-content-doesn-t-carry-over-to-CC3> ?