Sooner or later Asiana will be sucked into Korean Airlines, they are in ST with Delta.
With no forseeable transfer of points from VFF to KF at the moment, the only way would be to go, would be to look into redemption seat, using VFF points sitting on an SQ plane, SQ will probably have less seats for member of partner airlines, and have more seats for their own KF members, (((or pay and fly Y or premY, $$$ I know))).
Unless you have a lot of KF miles itself.
Some on here say one day soon, we will be able to transfer points from VFF to KF miles, but at the moment, its no go.
If you do have a KF account, but not a lot of KF points, or no KF points, just book flights from Au - SIN - ICN with SQ, pay for the fare with $$$ and earn the few miles in Y/premY.
Or if you want, Korean Airlines FF program (Skypass) points does last 10 years, so that is a plus, vs SQ's 3 and no ifs no buts way to extend that, covid being the only current reason for miles extensions, of course.
Doing Au - Korea flight, would save time, unless you want/have something/things to do in the SEAsia part to make a trip there worthwhile.
Too many things to consider at the moment, many options.
But for the time being, if you have VFF points to "burn", and wanting to go up there, maybe try to get redemption seats with SQ, using VFF points, as no transfers of VFF points to KF miles for the time being, it appears/seems.
Must remember that as of now, Virgin is flying by itself, and not in a formal alliance.