Can't post to Instagram stories from Instagram app
So, I just changed from Android to iPhone and already discovered that I can't post to my Instagram stories from the Instagram app that I downloaded from the App store. I don't get the "add to stories" icon anywhere. Is this a glitch? There appeared to be only one Instagram app in the store. Had to go back to my Android to post my story. How embarrassing, Apple. Please advise.
iPhone SE, iOS 13