I was using shorthand. There may occasionally be discrepancies between what is visible online and what agents can see - although I have always found that agents can find flights that are visible on the website of they search under flight numbers - maybe I have been lucky.
What I wanted to caution
@melbkate against was using a partner airline search engine in order to see additional availability - e.g. with QR. I think QR no longer releases any premium seats to QF (or maybe only very close to departure) and only releases economy seats a couple of moths out. To all useful purposes, QR is not available for QF redemptions.