Org charts
Org charts show the relationships of the people, functions, and teams within an organization.
Hierarchical Org Charts
I'm not a huge fan of hierarchical org charts. They present the company in a vertical structure that makes you think of silos. Org charts set up the expectation that Information and Decisions flow up the hierarchy, across, and then down. Instead you want Information to be direct not hierarchical.
Hierarchical org charts are useful to understand who is responsible for someone's expectations and behaviour. With these diagrams, you can tell the layers of the organization.
Examples
https://about.gitlab.com/company/team/structure/
Process Org Charts
In 1942, Walt Disney apparently created an org chart based on the process of creating a movie and the supporting roles.
Shadow Org Chart
https://carta.com/blog/the-shadow-organizational-chart/