Link to dashboard: European Election Dashboard
On the right side of the dashboard you'll see several sliders representing the political parties of the european parliament (i.e. ALDE, EFDD, ECR). The user has the possibility of clicking on those slicers, slicing the data for the report. What's cool about the slicers, except for the fact that they have some nice icons, is that they appear to be a card at the same time. Thus, users can inspect the trend of the voting patterns and tell whether a political party has increase or decreased in votes.
What visual is this?
The report is built in collaboration with MS, so I hope the visual is public available.
Unfortunately, only view the report, I'm not sure what visual it is.
The visual may be from Chiclet slicer or the visual is customized by the author.
You could have a consult with Power BI custom visual forum or you could have a contact with the Author of that blog.