I see that the facebook page plugins is was not visible show in your website because of those issue below:

SettingRequired ActionPage

Visibility

✅ Ensure the page is Published.

❌ If "Unpublished", click Edit → select "Page Published" → click Save Changes.

Country Restrictions

❌ Remove any country restrictions.

✅ Leave this field empty to allow global access.

Age Restrictions

❌ If set to "18+" or "21+", change it.

✅ Set to "Anyone (13+)" for broader visibility.

Page Audience

✅ Ensure the page is visible to Everyone.

❌ Do not restrict access by region or group.