Navigation bar
Also called: App bar, Tab bar, Toolbar
The bar at the top (title, back, actions) or bottom (main destinations) of an app screen.
Definition
iOS and Android use the names differently: iOS calls the top bar a navigation bar and the bottom a tab bar; Material calls the bottom one a navigation bar. Testers check back titles, truncation, safe areas and re-tap behavior.
In practice
Re-tapping the Home tab should scroll the feed back to the top.