Access Group Content Menu data via JSON:API

Problem/Motivation

I would like for each group to create its own menu which can then be accessed by an external resource using JSON:API. I am able to view the menu but I am unable to find a way to see the contents of that menu.

Using postman I receive this response:

{
    "jsonapi": {
        "version": "1.0",
        "meta": {
            "links": {
                "self": {
                    "href": "http://jsonapi.org/format/1.0/"
                }
            }
        }
    },
    "data": [],
    "meta": {
        "omitted": {
            "detail": "Some resources have been omitted because of insufficient authorization.",
            "links": {
                "help": {
                    "href": "https://www.drupal.org/docs/8/modules/json-api/filtering#filters-access-control"
                },
                "item--TvH6xvh": {
                    "href": "http://soadmin.lndo.site:8000/jsonapi/group_content_menu/lodge_main/bb1dd8d8-a432-406e-9ed3-d886b0bf0b5a",
                    "meta": {
                        "rel": "item",
                        "detail": "The current user is not allowed to GET the selected resource."
                    }
                },
                "item--IAcRcrM": {
                    "href": "http://soadmin.lndo.site:8000/jsonapi/group_content_menu/lodge_main/80b08975-f8b7-4840-b4a8-98ab80e7334f",
                    "meta": {
                        "rel": "item",
                        "detail": "The current user is not allowed to GET the selected resource."
                    }
                }
            }
        }
    },
    "links": {
        "self": {
            "href": "http://soadmin.lndo.site:8000/jsonapi/group_content_menu/lodge_main"
        }
    }
}

I have give the accessing account 'Bypass group access control' on the Groups module, and 'Administer group', 'Manage menus', and 'Access group content menu overview' on the specific group type.

If it is already possible to view a menu and its links via JSON:API I would appreciate any guidance.

Thank you!
Joe