power store 4 does not have the ability to duplicate products.
It is feasible to copy a product record directly in the database using an sql query, you will need to know the productID of the record you wish to copy, the query would look like:
INSERT INTO ps4_products (ProductSKU,
ProductName,
ProductPrice,
ProductRetailPrice,
ProductShipping,
ProductWeight,
ProductCartDesc,
ProductShortDesc,
ProductLongDesc,
ProductThumb,
ProductImage,
ProductUpdateDate,
ProductStock,
ProductLive,
ProductUnlimited,
ProductStartDate,
ProductEndDate,
ProductDigital,
ProductMaxDownloads)
SELECT ProductSKU,
ProductName,
ProductPrice,
ProductRetailPrice,
ProductShipping,
ProductWeight,
ProductCartDesc,
ProductShortDesc,
ProductLongDesc,
ProductThumb,
ProductImage,
ProductUpdateDate,
ProductStock,
ProductLive,
ProductUnlimited,
ProductStartDate,
ProductEndDate,
ProductDigital,
ProductMaxDownloads FROM ps4_products WHERE ProductID = 1210
I would strongly suggest making a backup of your database before trying this though.
This wont have any bearing on product options, you will need to manually add any options for the new product record that is created.