Sometimes the access token may be not validated automatically and some of your pages may not appear when connecting.
If you're trying to connect a Facebook Page, but can't see all the pages - please proceed the following.
Go to Business Integrations on Facebook, delete Planable as one of the apps and then try again to add pages in Planable (find out how).
When reconnecting Planable a model window will appear asking you to grant permissions for our app.
Make sure you tick all the boxes for all the pages you're managing and give Planable the right to "post content on your behalf" to schedule & publish posts.
Additionally, if you still have issues with a disconnected page please message us by using Intercom (green icon, right bottom corner).