Dropship service

Hi,

I currently have a supplier access and I need to be able to sell their products on my shopify, oberlo, facebook and wordpress sites.
The product will be the same from the same location. I currently have SFTP and API settings.
The process needs to be automated so I dont have to manage the stock on each account.

people seem to be getting confused so let me make this simple.

This is a example:

Apple is my supplier not ali express. Apple have provided me with SFTP and API’s and so forth. I need to create a shopify page. Pull the data from their site and have that displaying on my facebook, shopify, Oberlo and WordPress site.

The products will be the same. So the data being pulled is the same. but across multiple platforms