I was able to connect to the DB with Cloudbeaver, but it straight up wasn’t providing the diagram tab in the way the picture said it outta. The example pic even specifically is using a postgres DB as its example!

I pretty much had the exact same view, but no diagram tab. Unfortunately the wiki article doesn’t go into much detail, it just says:

“(if the tab is not presented then the object does not support the diagram presentation)”

With no information provided further listing off what is, and is not, supported for diagram presentation.

Lack of documentation it seems, which is unfortunate. It seemed like it has potential but I spent a good 20 minutes fiddling with it, trying different configurations and settings, nothing made it start working and it seems like (as is the case on a few of these tools) the ERD tooling is often a bit of an afterthought and poorly supported.

Many of the tools are sql first, ERD… third? fourth? forgotten and lacking most features :(