No direct way I know of. The quickest/overview I have found is using the API, you can get a pretty good list form 1 call using the API Browser if you are not comfortable using the API. The GET - /poweruser/v1/powerusers will give you a list of your users with high level info about their power user rights:
 

It also gives a lot of simple toggles to refine your search. You could take the JSON outputted and use an online converter to change it to csv/excel for you.

you can vote this one up

https://community.docebo.com/ideas/power%2Duser%2Dfilters%2Dand%2Dreporting%2D2785