Basic scope for UPI is 2.0 Fresh bank (issuer / Acquirer - to be raised as separate requests, depending on Bank's requirements). Further, the Bank needs to be live in IMPS product first - only then it will be eligible to raise for UPI
There is no separate process for Production Key generation. In every cflow request where the Bank needs to go-live, the request reaches Production movement stage after approvals from other NPCI teams – and here the Keys are generated and shared.