How to print the latest facebook posts?
I had a similar requirement (actually a bit more complicated, as I needed Facebook, Twitter and Instagram posts). I ended up creating my own Drupal 8 module - Social Feed Aggregator (https://www.drupal.org/project/social_feed_aggregator).

The module creates a new Social Post content type, allows you to enable each required feed integration, and set up a cron job to refresh the feed data. 

You can then simply create a Views block to show the feed data.