This situation has something to do with your user's role and access, 1231. I'll further discuss its details below.
The QuickBooks Online (QBO) mobile app supports admin and standard all-access role users. Others with lower permissions will need to use the web version instead. Hence, it's essential for your employees on the road to access QuickBooks via the browser to create other sales forms.
To learn more about the different user roles and access permissions, please see this article: User roles and access rights in QuickBooks Online.
Moreover, QuickBooks keeps track of all your account activities. If you wish to see who made changes to your books and what they did, utilize the Audit log. Check out this article for the complete guide: Use the audit log in QuickBooks Online.
If you have other concerns about managing sales transactions and user permissions, let me know in the comment section. We're here to provide the guidance and assistance you need.