una551 New Pages Experience
To add or edit country and age restrictions for your Page, you’ll need to have Facebook access with full control.
To add or edit country restrictions:
Log into Facebook, then click your profile photo in the top right.
Click See all Profiles, then select the Page you want to switch into.
Click your Page’s profile picture in the top left of Facebook.
Click Settings & privacy, then click Settings.
In the left menu, click Privacy and then click Public Posts.
In the Restrictions section, click Edit next to Country Restrictions.
Add one or more countries and choose to hide or show your Page to viewers in those countries.
Click Save changes.