Ok! Found it! The missing file was the product.json
In the code editor, under the “templates” folder, I selected “Add a new template” > “Product” and pasted my old product.json content to it.
Be aware that there was the broken custom metafiled which made the product not be imported. So look in the code for one of the “text” keys which would be something like
{{ product.metafields.custom.location.value }}
update or remove your custom meta field and it should work.
Hope that helps! 