It seems simple to implement, and it might lead to more engagement (for the platforms that care about that).
Instead, people rely on third-party tools to accomplish scheduling on Reddit and Instagram. Why is that? Is there some issue I’m not considering?
If you have a business account/page on Meta, you can schedule posts for both facebook and instagram. I believe you can also schedule tweets., although not sure if you can do it on a personal/individual account. Those are limited to photos/videos/reels though, not events or something.