Please follow the following steps if you would like to see what questions are being asked in Power Q&A:
1. Go into your Power BI App (if you don’t have the shortcut handy you can click on the Gear icon on the top right->Site Contents->Power BI
2. Click on the Gear icon again and then click on Power BI Site Settings
3. Click on Q&A
4. Find the file that you are interested in and click on Optimize for Q&A
5. Now you can click on the USAGE Tab and see the statistics, you can also check out the rest of the tabs to gain additional information that might be relevant to you.