When I receive Likes on my comment that I posted on the post of a page, I don't receive notifications. Where can I change these settings?
It would be default set as On,you can review by going to Settings -> Notification.
In that option "Activity that involves youView" which include You'll always get notifications about activity that involves you, like when someone tags you in a photo or comments on your post is set as On.Please try login with facebook in web and check whether you are getting notification correctly.
Been experiencing that problem for months too and no Google answer has ever helped me. I tried fixing it myself as of the moment and I'm glad it worked.
Go to Settings > Notifications > More Activity About You > and you'll see this.
"These are notifications for posts to your timeline, Likes and other Reactions to your posts, and more."
Turn on Allow Notifications on Facebook. Then viola!