Please have a look at this article from Brian Meier:
Starting September 1, 2019, content packs are no longer supported on Power BI online. Because of that, updates are no longer supported, and these content packs have been removed from powerbi.com and replaced with Power BI apps.
The Power BI apps are now available in Microsoft AppSource and function in the same manner as the content packs. The only difference is that you must have a Power BI Pro license to install a Power BI app. Once the app is installed, it can be shared with any user, regardless of license.
Follow the Dynamics 365 blog:
Want to know how to create a template app in Power BI?
Here are the requirements for building a template app: