What is the status of "shallow renderer"?

Google leads me to this page: https://reactjs.org/docs/shallow-renderer.html
However, I can not find it anywhere in the table of contents on the right.
Note that the versioning on the page suggests that this is a feature of React 18

I see that react-test-renderer does export react-test-renderer/shallow ( https://github.com/facebook/react/blob/main/packages/react-test-renderer/shallow.js ), but it isn't documented (https://reactjs.org/docs/test-renderer.html). I also see that shallow-renderer ( https://www.npmjs.com/package/react-shallow-renderer ) is versioned 16, and was last updated 2 years ago, suggesting to me that it is not up to date with React 18.

It would be nice if some clarification of the state of this feature was added to the page. (I'd be happy to volunteer to make such a PR, but I have no way of knowing what the definitive answer is :-) )

Beginne mit der verlinkten Dokumentationsseite zum shallow renderer und dem Einstiegspunkt react-test-renderer/shallow.js und vergleiche sie anschließend mit der verlinkten Dokumentation zum test renderer. Ermittle den Status des Features für React 18 und ob das separate Paket react-shallow-renderer aktuell ist. Als erledigt gilt die Aufgabe, wenn die Dokumentation den Status eindeutig angibt und in der Navigation angemessen erscheint.