Accessing Multi Select++ Field from Automation

Value of a “multi select++” field is an array. For example.

"customfield_10700": [
            {
                "self": "http://localhost:8080/rest/api/2/customFieldOption/10300",
                "value": "Amazon",
                "id": "10300",
                "disabled": false
            },
            {
                "self": "http://localhost:8080/rest/api/2/customFieldOption/10302",
                "value": "Apple",
                "id": "10302",
                "disabled": false
            }
        ]

You can access the names of selected options with {{customfield_10700.value}}. To get representation of any custom field you can use Jira’s Rest API, your_jira_url/rest/api/2/ISSUE_KEY.