Earlier quoted context omitted.
More information on what we mean by that term can be found here: https://book.amethyst.rs/stable/glossary.html If viewed as goals, we aren't quite there yet, but we're working on it. =)
Generally the mentioned tools, particularly an editor of some sort in the style of the Unity or Unreal editors, are an important component of a data driven game engine. I didn't see anything skimming over the site about an editor. Is that part of the plan?
It is in very early stages. We are developing it as a WASM app that runs in a system webview, or can be accessed via a regular web browser for a more cloud-y experience. I'll take this opportunity to promote the awesome Yew project (https://github.com/DenisKolodin/yew) which is what we use for the frontend.