Hi @eggbuy
Without being able to access the app details or knowing what the app’s function is, I can only make an educated guess as to what the rejection message is pointing to.
Is your app designed for product sourcing/drop shipping? If yes, where are the products that your app offers being hosted for import? If those products are being imported from a Shopify store, that will not work for this app design.
Dropshipping sources must be hosted OUTSIDE of Shopify and allow for Shopify merchants to bring those products into their store. I believe this is related to this requirement in our developer documentation: Requirements for public apps on Shopify | Section 1.7