There are 2 ways of viewing your created posts:

The first way is to click Planner and then click Posts. Here it will be shown all the posts that have been drafted/published/scheduled.

The second way would be easier for people who manage a lot of posts and want to have a timeline of them. Start again by going to Planner and then click Calendar. Here It will show all the posts that are drafted/published/scheduled but will be laid out more easily in a Calendar-type way.