In parameters of the CopyObject request, there exist lock-related headers:
x-amz-object-lock-legal-hold Specifies whether you want to apply a legal hold to the copied object.
x-amz-object-lock-mode The Object Lock mode that you want to apply to the copied object.
The question is whether the lock is set on the original object being copied or on the newly created copy? The "copied object" term is not clear from the context of that page.