Am coming back to building a FB app after some time away from the FB Platform and I see that the old offline_access permission has been removed and replaced with long(ish)-expir
For the specific "need to push data" scenario, facebook announced new Page object connections that allow you to create post's with a specific publication time. With these in theory you can get rid of the problem by authenticating the users when creating these and let Facebook post them instead of scheduled jobs on your side.