you can't over write the text that appears on a sub landing page as child. There is a field called 'Link text' but adding alternative text does not stop the page pulling in the page title by default.
Example https://lbc-app-w-localgov-corpwebsite-p.azurewebsites.net/libraries-leisure-and-culture/parks-and-open-spaces
The Link text field is only relevant when linking to external sites.
Is this an issue?