Because it checks paths under 'admin', not the contents of the management menu.
Closed: outdated
9.5
Makes Drupal easier to use. Preferred over UX, D7UX, etc.
Refactors an existing API or subsystem for consistency, performance, modularization, flexibility, third-party integration, etc. May imply an API change. Frequently used during the Code Slush phase of the release cycle.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
There hasn't been any discussion here in 11 years. I don't work on the menu system but I will go out on a limb and say that the changes in the last 11 years make this outdated. If there is still things to do here then a new issue should be opened.
Thanks