Why do I need to checkmark / enable "Mobile App Creator" sales channel for all my products on the Shopify Admin Panel?
All products on your store must be marked visible on the Mobile App Creator - Mobile Apps Builder - Plobal Apps Sales Channel.
If not, users will not be able to checkout from the mobile app and will see an error message saying "Oops, there's some problem with your cart"
Steps to mark "products" visible for the Mobile App sales channel :
Login to your Shopify admin panel
Go to Products - Select all the Products on your store
Click on Bulk actions - Make products available
Select the Mobile App Creator - Mobile Apps Builder - Plobal Apps Mobile Application
Click on Make products available
Steps to mark "collections" visible for the Mobile App sales channel :
Login to your Shopify admin panel
Go to Collections - Select all the collections on your store
Click on Actions
Click on - Make products available
Select the Mobile App Creator - Mobile Apps Builder - Plobal Apps Mobile Application
Click on Make collections available
Hope this article is useful :)