Currently, you can duplicate an entire item, but you can only add a new variation, not duplicate an existing one. This wastes a lot of time when you have many similar items, which may only differ e.g. by colour, but have the same Unit Cost, Vendor, Weight and Price and a very similar SKU which may only require a small change.
Adding a Duplicate option to an existing variation would be extremely useful and would fit perfectly in the option lists when you press the ellipsis (...) at the end of the variation line.
Square Community