Facebook API comments returning 200 error

I am trying to get comments to work (ideally I just want the total comments per post-id.)

when I input this:

https://graph.facebook.com/v11.0/post-id?fields=comments&access_token=XXX

I get this:

{
   "error": {
      "message": "(#200) Missing Permissions",
      "type": "OAuthException",
      "code": 200,
      "fbtrace_id": "AEsjATqKyfKbfePVALML5nO"
   }
}

Permissions (Page access token):

read_insights
pages_show_list
pages_read_engagement
pages_manage_metadata
pages_read_user_content
pages_manage_posts
pages_manage_engagement
public_profile

Please help