Soon the ability to use the mobile Dynamics app will be available for production usage.
To enable this to your users, you will need to perform some actions:
Update mobile offline profiles- to include relevant entities
Add relevant users to users’ grid of the profile
Enable offline for the relevant app and choose offline profile
After switching to offline mode, the user will have access only to entities that are defined in the profile.
Use this article for full instructions- https://d365demystified.com/2019/04/24/enable-mobile-offline-for-d365-for-phones-app-in-d365-v9-x/amp/