Usually, when I encounter a 200 OK status but get an empty response body, it means the API call was technically successful, but no data was returned. It is either because there’s no data to return, or the request parameters aren’t correct.
If you’re testing this through code, you can use simple print statements or log the response data before sending it back as a response to the API request. This can help you confirm whether the issue is on the Postman side or in how you’re handling the response.