settings > design components/ advert templates / VSP templates / onboarding templates.
Recently we have been remaking the same components/ advert templates but with added features/ alternative content display suggestions. Being able to duplicate & rename once duplicated would save us lots of time.
Also being able to duplicate an advert / vsp / Ob also with all of its dependencies would help with time too.. in case we needed to make a variation of the same template in the future.