Instagram will soon release a feature to respond to stories by sending voice messages. Instagram is going to make this feature public to add a way to interact with the story.
Developer Alejandro Paluzzi shared a screenshot about this. Instagram has not officially commented on the feature.
Since there will be a lot of messages by direct message and reply in the inbox, Apple is going to bring voice message reply feature to reduce that. Recently, Instagram had brought a feature where you can only like the post when reacting to the story.