Hi there, I see you want to connect Shopify to your Amazon and eBay stores so you can easily migrate your products to Amazon and eBay. I've worked on it, and I can recommend some softwares. With those apps/softwares, I can completely automate your Shopify stores to the different marketplacees like Amazon, eBay, walmart. Your orders, Listing templates, pricing strategies, and quantities can all be changed with that tool.
So let's get started syncing your Amazon and eBay listings with Shopify.
Looking forward to hearing from you.
Kind Regards
Zaheer Hassan