JSON:API many-to-many meta data

I am accessing an API that includes data from a many-to-many relationship table as JSON:API relationship meta data. This is defined in the JSON:API specification at https://jsonapi.org/format/#document-resource-identifier-objects.

I am using Ember 3.18.1 with Ember Data 3.18.0. Both models have @hasMany. The route retrieves the data as follows.

model(params) {
    return this.store.findRecord("table1", params.table1_id, {
        include : "table2s"
    });
}

I have read the Ember Metadata documentation (https://guides.emberjs.com/release/models/handling-metadata/), but I see nothing about reading metadata for individual relationships. How can this be done in Ember Data?

Below is an example of the JSON.

{
    "jsonapi": {
        "version": "1.0"
    },
    "data": {
        "id": "1",
        "type": "table1"
        "attributes": {
            ...
        },
        "relationships": {
            "table2s": {
                "data": [
                    {   
                        "id": "11",
                        "type": "table2",
                        "meta": {
                            "order": 1
                        }
                    },
                    {   
                        "id": "12",
                        "type": "table2",
                        "meta": {
                            "order": 2
                        }
                    }
                ]
            }
        }
    },
    "included": [
        {
            "id": "11",
            "type": "table2",
            "attributes": {
                ...
            }
        },
        {
            "id": "12",
            "type": "table2",
            "attributes": {
                ...
            }
        }
    ]
}