whoaitsaimz

In theory you would have to get an ICS or RSS from facebook and then import into all-in-one event calendar.

See instructions here, they look very outdated and likely facebook has changed the exact location of this button but worth a look: https://icalevents.com/4162-finding-the-facebook-events-ics-feed-for-subscribing-or-syncing/

Same question

Most apps are not being granted permission to read_stream, as facebook wants to keep all of its data within its native apps (for web, iOS, TVs, etc).

Can someone verify if this works?

Your code worked for me in WordPress 3.4
What version of WP are you using?