Find analytics under "Engagement Reports" and the Reports Dashboard.
Click your username on the top right corner and then select [Engagement Reports].
This will take you to your Reports Dashboard, and from there you can view your analytics for multiple posts or campaigns.
Note: If you choose to leave the Reports Dashboard while the report is generating, your new Engagement Report will be emailed to you once it is complete. All generated Reports will be saved to the Engagement Reports page.