Copy driveItem response with ReadableStream { locked: false, state: 'readable', supportsBYOB: false }

Question

Ref: https://learn.microsoft.com/en-us/graph/api/driveitem-copy?view=graph-rest-1.0&tabs=javascript

I want to copy a driveItem from a location to another. The action is completed but I do not receive the response specified here: https://learn.microsoft.com/en-us/graph/api/driveitem-copy?view=graph-rest-1.0&tabs=javascript.

HTTP/1.1 202 Accepted Location: https://contoso.sharepoint.com/_api/v2.0/monitor/4A3407B5-88FC-4504-8B21-0AABD3412717

Instead I receive: ReadableStream { locked: false, state: 'readable', supportsBYOB: false }.
How am I supposed to retrieve the information?