They are not appearing in the changing station i’ve only checked for maya but its probably bugged for them all. As far as I know, and can find, these skins do not require any dlc. They say they are unlocked after putting the shift code in however it doesn’t appear so.
Maya’s head is the Nisha reference one, correct?
Please open a support ticket on this issue. You can find the instructions for the PSVR version here: