import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const response = await client.messaging10dlc.campaign.getOperationStatus('campaignId');

console.log(response);

{
  "10017": "APPROVED",
  "10035": "REVIEW"
}