What is the actual Qatar skilled labor visa approval process?

Some companies apply for visas and after approval, they take employees to Qatar and do the actual biometric, medical, and other formalities. and some companies redirect to QVC to take the same formalities before Visa approval.


I wonder if this is normal and why there are differences, and curious to know what the actual role of QVC? I thought that everyone (for APAC) should visit QVC and get the necessary approval to get the required visa. Please educate me if I'm wrong. Thanks.