Hi there, does solidus have an overall architecture diagram?

Hey! I'm not aware of that. However, you can use a tool like https://github.com/voormedia/rails-erd to generate an ERD diagram for your store, though. If there's any particular part you'd like to get more insight into, don't hesitate to ask!

There’s also this tool that helps visualizing how Solidus works: https://github.com/solidusio/solidus/discussions/3949