Instagram allows users to share other users’ Stories posts through direct messages. However, creators have the option to turn this feature off if they don’t want other users to be able to share their Stories posts through DMs. Our guide will show you how to stop users from being able to share your Stories posts…

(SOURCE) https://www.adweek.com/media/instagram-heres-how-to-stop-users-from-sharing-your-stories-through-direct-messages/