If you are trying to add DAZ avatars into CLO and the hair and eyes are not connected to the body of the avatar, you may need to adjust a few things;

• Update DAZ. I was using v 4.21.05
• When you add the hair, Right-Click it and choose "Merge Into Scene"
• In the FBX export settings, check "Merge Followers [into Target] see attached image

This should solve your problem. Good luck.