Microsoft Graph is the gateway to data and intelligence in Microsoft 365. It provides a unified programmability model that you can use to access the tremendous amount of data in Microsoft 365, Windows, and Enterprise Mobility + Security.
Microsoft Graph is a RESTful web API that enables you to access Microsoft Cloud service resources.
The Microsoft Graph API is not a visualization tool for reporting/charts etc.
If you want a dashboarding tool with charts and other visualizations for PKI, OOE etc. , check out Power BI.
Power BI is a collection of software services, apps, and connectors that work together to turn your unrelated sources of data into coherent, visually immersive, and interactive insights. Your data might be an Excel spreadsheet, or a collection of cloud-based and on-premises hybrid data warehouses. Power BI lets you easily connect to your data sources, visualize and discover what's important, and share that with anyone or everyone you want.
Here is the full free training path for Power BI on MS Learn.
If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.