Currently executing the GET issue API if there's a value for "Affected Service" it'll return the following information:

"customfield_10030":[{"id":"ari:cloud:graph::service/xxxxxx-abce-xxxx-1234-xxx/1234abcd-xxxx-xxxx-xxxx-12ewed281xxx4"}]

However, it's desired to know the Service Name and Tier.

Workaround

At the moment the way to get this information for a service is to query the GraphQL API. The GraphQL query to get the name and tier level of a service using the id returned by the GET issue query would be:

query GetServicesById {
  devOpsServicesById(ids:["ari:cloud:graph::service/xxxxxx-abce-xxxx-1234-xxx/1234abcd-xxxx-xxxx-xxxx-12ewed281xxx4"]) {
    name
    serviceTier { 
      level 
    }
  }
}