Sameeh you get the full non-compiled source code of the customer/delivery app.
With that you will be able to make customizations on your local system, compile the code and push to your server.
Documentation:
https://docs.foodomaa.com/advanced-usage/using-the-full-source-code
Note: extended license can also be used on a single domain (we provide staging, dev subdomain license for free if your business needs that with the extended license)