I made a tool which queries an Azure tenant and then generate a network diagram based on the output. The diagram is generated using draw.io and is fully flexible and editable. The solution is fully open-source and currently offered through a SaaS platform: https://www.cloudnetdraw.com/ or as a self-host option on the same page or in the GitHub repo https://github.com/krhatland/cloudnet-draw.

Built on python and structured JSON.
Generates both a High-level diagram showing each vNet in regards to the respective hub, and a Mid-Level diagram illustrating each subnet in each vNet and if there are NSGs or UDRs attached

Can be shown as a quick 10-15min demo, or a deep dive in the tech-stack on 45-60mins depending on audience.