Share your Instagram Story to Facebook automatically
Instagram now has a feature whereby you can share your Instagram story on Facebook in just one click without leaving Instagram.
This is how you can share all future Instagram stories on Facebook automatically:
Go to your profile and tap the Settings-button in the top-right corner.
Scroll down and tap Story Settings.
Next to Share Your Story to Facebook, tap on the right side of the button. The button turns blue and that's all you have to do! Your future Instagram stories will now be posted automatically on Facebook too.
When you share your Instagram story to Facebook, it will appear as a story at the top of News Feed. Keep in mind that anything you share to Facebook, including your Instagram story, works with your existing Facebook privacy settings.