facebook notifications and windows 10 action center

[Christine Moss]

this is my first post on here. I have a question I hope someone can answer.
What settings do you have on your phone and laptop in order to receive Facebook notifications? I used to receive Facebook notifications on both phone-Lumia 950 and my laptop but now I receive them on neither. Has something changed? I occasionally receive on desktop when I have the app open..
would like to have them shown again in action center. Thank you in advance for any help