Display "Location" of a note/notebook in note/notebook properties

Desktop has the workaround of using the Note Tabs plugin with its Show breadcrumbs option checked under Tools > Options > Note Tabs.

The feature request described in Testing - v1.8.2 - Title Bar Path Format (Minor) would also satisfy your request on desktop if implemented, specifically with how:

The mobile app shows which notebook any note belongs to in the dropdown at the top of the screen.