The Power BI Field Parameter option now has the ability to show the elements of the Parent Slicer in a second slicer - "Show Values of Selected Field"
Did you know I've written a new-comers guide to Power BI
"Power BI for the Excel Analyst"?
00:00 Intro
00:18 Turn on the preview
00:40 Setting up Parent Slicer
01:40 Previous Limitation
01:56 The Magic Right Click to "Show Values of Selected Field"