Hi!
I did both, it reads “You don’t have any apps yet. I am able to open in a browser only.
Here are some other things I looked into on the desktop version:
Plans: Power Apps for Office 365 for Government
These are subscriptions on my account:
Office 365 GCC G3
Microsoft Bookings
Information Protection for Office 365 - Standard
Insights by MyAnalytics for Government
Power Apps for Office 365 for Government
Power Automate for Office 365 for Government
Stream for Office 365 for Government (E3)
Microsoft Forms for Government (Plan E3)
Office 365 Planner for Government
Microsoft Teams for Government
Azure Rights Management
The latest desktop version of Office
Skype for Business Online (Plan 2) for Government
Office for the web (Government)
SharePoint Plan 2G
Exchange Plan 2G