2. The FBA marketplace added: This should be enabled in our app for respective FBA marketplace you are catering to or for the marketplace you are selling the products in.
3. Correct SKUs mapping: The FBA SKUs should be mapped correctly under Product Linking.
4. Shipping speeds:
The Shipping speeds/ methods should be configured and mapped correctly in our app.
(This will ensure you get orders from your website seamlessly. Click here to know more.)
Also, you can refer link below to ensure the app setup/ configuration.