I discovered my recipient's mobile number / account number has been flagged in Scameter. How come the bank / SVF operator did not alert me when I previously made payment to this FPS proxy ID / bank account number / SVF account number?

The FPS proxy IDs flagged as "High Risk" in Scameter and included in the high risk alert are based on information collected from scam reports provided by the Hong Kong Police Force.  If there has not been any report to the Police against a particular proxy ID / account number, the proxy ID / account number will not be included in the high risk alert.