With the introduction of the local business data, or on-premises, deployment option, Microsoft has published a list of ‘Features not implemented in on-premises deployments’. Some examples of features on this list are not the least of features. I new already about the Power BI integration and analytical workspaces, but included are also the mobile apps, the warehousing mobile app and task recorder.
These features are to be expected on a later moment, since they are not deprecated. However, due to complexity in combination with the on-premises deployment they are not available at this point. No timelines have been released for now, but news is expected.
Be sure to check the full list: https://docs.microsoft.com/en-us/dynamics365/unified-operations/dev-itpro/get-started/features-not-implemented-on-prem