Tridion Docs REST API endpoint to update content as new version

I'm trying to use this endpoint to update content

PUT/v3/DocumentObjects/ByLanguageCardId/{LanguageCardId}/Content

Updates the document object content by its language card identifier.

It works, but it overwrites existing version. How can I also rev the version during the update process?

I did see another endpoint to create new version:

POST/v3/DocumentObjects/Versions
Creates document object version. - NOT IMPLEMENTED

But it says not implemented. Does that mean I cannot use the REST APIs to update content of existing object as new version?