Where is the Niagara sample project?

A couple weeks ago someone from Epic Games demonstrated the Niagara sample project in the livestream. They said the sample project can be found in the Learn tab on the launcher.

It’s been a while and the project is not yet posted. Even the new face AR sample project is posted already.

When will the Niagara sample project gets posted?

If you already have the Learn-> Content Examples you can delete it and redownload, then you will get the new level with Niagara examples included.