Here the right way
morph your body and exported this with the Theeth and eyes as FBX in your 3D Applikation . Now is important that you adjust the Eyes and Theeth with the Bones on the right position
Again !!! Not move the vertices, use Bone !!!
Export it back in CC as Cloth, not as Morph , Now is the Character in the View and can saved as iAvatar . Then create a Morphslider and use this iAvatar as target Morph
You will get a Morph slider which now morphed all in One
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liebe Grüße vidi