Most of the users facing issue for scheduling reeels, photos and carousel post directly from Instagram.
Now professional accounts can schedule Instagram post directly from the Instagram
Social media app Instagram, recently launced these features for users.
You just need to upload reel and update information like Title and Description.
After update details, scroll down and find "Advanced Setting"
In advanced setting post scheding function showing, need to unable this option
Select date and time to publish your content and schedule.