You can set Up IBM MQ REST API and you verify in advance that your IBM MQ instance is configured to expose its REST API endpoints.
https://developer.ibm.com/tutorials/mq-connect-app-queue-manager-cloud-azure
Or in your ADF pipeline, you can add a Web Activity to make HTTP requests to the IBM MQ REST API. Configure the activity with the appropriate HTTP method (GET to retrieve messages) and the URL endpoint of the IBM MQ REST API.
https://learn.microsoft.com/en-us/azure/data-factory/control-flow-web-activity
If you need more advanced integration capabilities, consider using Azure Logic Apps with the IBM MQ connector https://learn.microsoft.com/en-us/azure/connectors/connectors-create-api-mq