New Update [15 June 2020]: We've made it easier to approve posts. In addition to the current method of approving from the Approve screen, you can now also approve them directly within the Queue.
To be able to do this, first, you have to add yourself as a user and assign it as 'Admin.'
Go to Account > Manage Users > Add New
Then, go to your user's account, click on the dropdown arrow, select Edit
Scroll down until you see 'Permissions' then 'Publish'
Select 'Hold social posts for approval'
Then select your username. That's it!
Here's a video to guide you.