It’s happening: now Page Admins can publish and schedule posts on Instagram and IGTV thanks to Facebook's Creator Studio app.
Facebook finally meets the demand of many Community Managers. Until now, it was necessary to go to third-party tools to program content on Instagram, but Facebook has just implemented the possibility of doing it natively, through Facebook Creator Studio.
To be able to program content on Instagram - and also on IGTV - through Facebook Creator Studio you only need to enter it, through Facebook (Note: You can't schedule Instagram Stories posts as yet) and "Connect Your Account".
How to schedule posts on Instagram from Creator Studio