Champion Level 3If only! Sadly, this is not possible.
Some workarounds you could consider:
Low effort:
Create the donut chart, and create another Filter Results gadget next to it. You can populate the filter results with links that will open reports specific to the slices in your donut chart. As an example, see img1 below is not related to a donut chart but you get the idea - I sometimes use this to share reports with others.
High effort:
Option 1: Export all data to Excel and write your own charts with drill-down features. I have had to do this in the past and use it to create my own burn charts (the one in Zephyr is broken and has been for over 4 years!). It's high effort and requires manual maintenance and data discipline.
img1: A Filter Results gadget using Issues that contain hyperlinks to Zephyr reports
