Develop own widget on dashboard view

[sashmen5]

Hello everybody.
I am developing some extension for Azure DevOps.
I got the problem with widgets. All examples of this repository shows how to develop it with old UI.
No documentation about new UI.

After many failed attempts, I built an extension from Microsoft example - analytics-example-widget.
But I still do not see any changes on my organization page. (Uploaded, Published and Installed to organization).
All other own HUBs are available.

How can I add any widget/data to dashboard or summary tab in new UI?
Thank you