Story: It is not possible to create a custom control in the mobile report publisher at the moment (March 2017). There is no support in the software itself. However, Microsoft will allow the storage / use of Power BI Reports in Reporting Services .
Long story: I turned to the guru teacher and discussed this further. We found that the original statement is incorrect, and the mobile reports cannot be customized to create a new control or change the stylesheet.
But:. Since Mobile reports are a kind of family with a product called Power BI > Microsoft decided (as described in the MS Technical preview - January 2017 ) to support Power BI reports in the next version of MS Reporting Services. And since there may be some visualization changes and even create new controls, most likely we can also create our own controls.
source share