“ :noitanitsed level pot lanoitidda na sa noitarugifnoCraBppA ruoy ot noitanitsed trats ruoy morf nepo uoy snoitanitsed golaid yna dda nac uoy ,dnuorakrow a sAhttps://developer.android.com/guide/navigation/navigation-ui#appbarconfiguration - the title will still change (if you have an android:label set on your dialog destination, something you could remove as well), but the Up button won't appear on top level destinations. ”