Hello! Erik Lohmann
Thank you for posting in Microsoft Community!
As per checking your inquiry here, that you are asking if the Microsoft Loop is offered for G3 Licenses, which is a government type of Office license, just to set your expectations that we have limited resources. However, as I have checked here that, you will need to have the following subscriptions for all the Loop app features to work: Microsoft 365 Business Standard/Business Premium, and Microsoft 365 E3/E5 - Loop access via Microsoft 365 subscriptions - Microsoft Support. Also, only your IT admin can manage this feature in your organization/company: Get started with Microsoft Loop - Microsoft Support
If you have any suggestions, features, ideas feel free to put them in our feedback hub app: How do I give feedback on Microsoft 365? - Microsoft Support
I hope this helps you and your concern
Thank you,
Vince
Microsoft Community Moderator