How to disable 'Instants' on Instagram and unsend photos?

Meta launched "Instants", a feature that lets users share photos with close friends or mutual followers. To disable it, users need to open their profile, tap three-line menu at top right, scroll to "Content Preferences" and toggle on "Hide Instants in Inbox". An "Undo" option, below shutter button, will help retract the photo before it is viewed by others.