If you have created and approved drafts, you can see a list of them. To do that:
Go to the Social Media app, then click on Drafts.
In the upper left corner, above the connected accounts lists, click on 'Drafts'. Click on Ready to Publish on the dropdown menu.
You will se a list of approved drafts.
You can schedule, edit, send back to drafts or delete them by clicking the dropdown arrow next to the Schedule bottom at the bottom of each draft.