It's normal for software to have some place from the interface bringing you to the general documentation for it.
Bug 53862 removed the link to a local help page from the default sidebar because such a page doesn't usually exist for obvious reasons; we can point to [[mw:Help:Contents]] which is already available in over 30 languages and is improving thanks to the Translate extension usage expanding in the namespace.
Version: 1.22.0
Severity: enhancement