There are a few reasons why a campaign might not be appearing on Facebook. Try checking the following:
Are you looking at only active campaigns on Facebook?
Ensure you don't have a filter on for only active campaigns. If your campaign has dayparting set up, it might be currently paused or not delivering. Paused campaigns can also appear lower in your campaign list.
Do you have any default filters applied to your campaign list?
Ensure you don't have any active filters while looking for a new campaign.
Are you looking at the right ad account?
Beware of similar ad account names! Ensure you are checking the right one by looking at its ID.
In AdEspresso, the ID is displayed on your Facebook ad accounts page.
In Facebook, confirm the matching ID in the URL of the webpage: