For making this more helpful and clear for you
When you switched from another Apps to our Ali Orders Apps to use, we basically will sync all the information of your product from Shopify to our app.
We are not getting any information directly from another Apps to our app.
As long as those information contained on Shopify, we will sync them to our app.
Information synced to Shopify > Shopify sync information to our app.
I hope this might be helpful for you.
Should you have any other concern, feel free to let us know via our live chat channel by clicking on the bottom right icon inside app, or our email at email@example.com.