In order to track and analyze Owned Facebook pages and posts, you must Authenticate the page in Canvs. Authenticating a page will track and analyze new content from your selected asset moving forward.
Select Owned Facebook Data from your Profile dropdown in the far right of the application header.
Click on the Authorize More Pages button.
On the next screen you will need to Authorize Canvs in order to proceed with ingesting data. The Facebook account you log in with needs to have Admin access to the Facebook Page you are looking to ingest data for.
Once authorized, select the page you would like to track.
From there you can Enter post ID of the post you'd like to pull. You will need to ingest Facebook Dark Posts this way. You can also Authorize for Continuous Feed for the page as a whole.
You will receive a confirmation email and the Facebook page or post will be available to analyze in Canvs shortly after.