Perhaps you haven't updated the Instagram app to the latest version. Also, it might be that your account doesn't meet the requirements for sharing reels on the story feature.
2024-10-10 08:37
Maybe there's a glitch in the app. Sometimes these things happen randomly.
It could be that your account settings are restricting the sharing feature. Check your privacy and sharing settings to make sure they allow for sharing reels to your story. Also, make sure you have the latest version of the app installed.