Hello ,

there are different kind of restriction in Facebook like age or country restriction and also you can restrict who can see or share your post here I will explain some of them and at the end I will introduce some pages I hope my explanation will be useful for you.

For disabling restrict age and country you can follow these steps;

1- Go to your page

2- Click on setting.

3- In the age restriction part click edit.

4- Here you can specify your age range or select public to disable age restriction.

In the country part you can restrict specific country if you want or you delete their names and allow everyone visit your page.

 I hope my text is useful for you.