Full Comprehensive PowerBI Service Audit

Hi icassiem ,

For more details, you can refer the below Microsoft Documentations:
1.Power BI PowerShell Overview & Installation: Power BI Cmdlets reference | Microsoft Learn
2.Connecting to the Power BI Service:Connect-PowerBIServiceAccount (MicrosoftPowerBIMgmt.Profile) | Microsoft Learn

Here are some mapping to your requirements:
1.Report names & count:Get-PowerBIReport (MicrosoftPowerBIMgmt.Reports) | Microsoft Learn

2.Workspace names, count, members:Get-PowerBIWorkspace (MicrosoftPowerBIMgmt.Workspaces) | Microsoft Learn

3.Active/inactive workspaces:Get-PowerBIActivityEvent (MicrosoftPowerBIMgmt.Admin) | Microsoft Learn

4.Active users (names) > [Get-PowerBIActivityEvent]

5.Inactive users > Compare all users (Get-PowerBIWorkspaceUser) with active list from Get-PowerBIActivityEvent

6.Report usage (including link views) > [Get-PowerBIActivityEvent]

7.Get-PowerBIDataset (PowerShell):Get-PowerBIDataset (MicrosoftPowerBIMgmt.Data) | Microsoft Learn

8.Get Refresh History (Power BI REST API):Datasets - Get Refresh History - REST API (Power BI Power BI REST APIs) | Microsoft Learn
9.Failed refreshes > [Get-PowerBIRefreshHistory]

10.Data size per workspace > Admin API in Power BI REST APIs for embedded analytics and automation - Power BI REST API | Microsoft Learn or Premium Capacity Metrics App

11.Personal workspaces > Get-PowerBIWorkspace -Scope Individual

Thank you.