Steps to reproduce the issue

Doing a GET request for a single Article or Group of Articles doesn't return all the data.
In this case, I am going to specifically report Meta Data and Meta Desc.

Expected result

Should return all the data that's available in the UDPATE and CREATE API request.

Actual result

    "data": {
        "type": "articles",
        "id": "9",
        "attributes": {
            "typeAlias": "com_content.article",
            "id": 9,
            "asset_id": 110,
            "title": "Title of Article goes here",
            "state": 1,
            "created": "2020-07-10 13:55:11",
            "language": "*",
            "tags": {
                "2": "test",
                "3": "test2"
            },
            "text": "<p>My text</p> "
        },
        "relationships": {
            "category": {
                "data": {
                    "type": "categories",
                    "id": "8"
                }
            },
            "author": {
                "data": {
                    "type": "users",
                    "id": "30"
                }
            }
        }
    }

System information (as much as possible)

Joomla 4 Beta 2

Additional comments

You can update metadesc and metakey using API but you don't know what the value of those keys are in an existing article.