Allow shared ipad

Hi, this option is enable in restrictions on a supervised dep enrolled device running iOS 14.2 but we see no guest sign in option, are there any other pre-requisites?

Allow Shared iPad temporary session

Users can access Shared iPad without a password by tapping Guest on the sign-in page. This starts a temporary session.

When users sign out of a temporary session, all their data is deleted.

In a temporary session, users can’t edit account settings or sign in to Apple services.