How to create test data for company PSC list in the sandbox environment

We are using ‘https://test-data-sandbox.company-information.service.gov.uk/test-data/company’ endpoint to create test data in the sandbox environment.

We are able to retrieve company data using company profile endpoint but unable to retrieve company PSC list.
Company house PSC list endpoint- https://api-sandbox.company-information.service.gov.uk/company/{company_number}/persons-with-significant-control

We are getting below response-
{

"errors": [

    {

        "error": "company-psc-not-found",

        "type": "ch:service"

    }

]

}