Turn on your Do Not Disturb during a movie and have it turn off automatically when you leave the location.
Open Control Center > Hold on "Focus" and select "Until I leave this location" under "Do Not Disturb"
How to Turn on your Do Not Disturb during a movie and have it turn off automatically when you leave the location
TIP FROM
8 Useful iPhone Features and Tips You Should Try
Helpful iPhone features including sleep timer, measure app, music volume boost, and location shortcuts