It's not entirely because eBay stipulates that each product must correspond to a unique link, but for the same product with different colors, sizes and other variations, you can set up multiple variation options on the same product page, and each variation corresponds to a unique link. In addition, you can also consider using eBay's bulk editing tool to manage the information of multiple products, which is convenient and efficient.

Not necessarily. On eBay, you can list multiple products in one "product list" at the same time. This method makes it easy to sell multiple products at the same time. At the same time, if you want to combine multiple products into a package, you can also list multiple product links in one "package list".