If you're setting up a Facebook Channel and just want to post to or pull in a feed from a Facebook Page, you usually don't need to go through the review process. To avoid the review process, the channel owner should be a Facebook user that is both 1) an admin of your app and 2) an admin of your FB Page. You'll then be able to grant the permissions needed to post on your behalf and read from your Page. Since you don't need those permissions from all your users, you don't need to have it reviewed since you won't be asking for those details.
I hope this helps explain, but let us know if you have any questions.
-Melissa