Hello,

Navigate to layout > Edit Single Product layout and in the layout you can create these fields in your product pages where you can input the links to the product on different platforms like Amazon, eBay, Etsy, etc.

Or if you want to redirect each product to a specific platform try to add an external/affiliate product.
Follow this guide:
https://woolentor.com/doc/how-to-add-external-affiliate-product-in-woocommerce/

Best Regards.