OAuth Redirection - app rejected

Our app was rejected due to the reason-
OAuth must be the first page a merchant lands on after they click add the app from the Shopify App Store. Use OAuth to ask for scope permissions immediately after merchants add your app.

Here is the video of the app installation.

The installation flow for the app by the users is through our application and not via Shopify. It is working as expected from our application, asking for OAuth scope permissions. What changes are required to ensure that the users land on the OAuth permissions page after clicking ‘install app’ instead of our app login page? We are unable to figure out the configuration change.