I am trying to find a private company by PermID and I cannot:
data, err = ek.get_data(["5050720719"],"TR.CompanyName; TR.FiSIC;TR.NISIC; PECompanySIC;") print(data)
As far as I can tell, I don't see those specific data points within the DIB (Data Item Browser). You can research what details are available for private companies when viewing within the DIB.
I would suggest you open up a ticket with the Refinitiv Helpdesk to find out if this content is available.