I had a Facebook post that I promoted, and the promotion has run out. It was actually very successful and I want to promote the same post again. However, I see no such option anywhere on the post promotion menu. I also see nothing about this in the Facebook help section. Does anyone know how to do this?
You can only promote a post on Facebook once. If you want to promote it again, you'll need to create a new post and promote that.
You can only publicise a recently made post. This is usually up to three days. If it's from a personal account, it's within the last six:
When you run a promotion on a post it will run long enough as to make it unable to promote the same one again.