In your case, you’ll need to rely on QF checking you through from one booking to the other at check-in, which they should do for QF<>QF, QF<>EK, or QF<>QF award (incl partners)
Will someone please pass this information on to the Perth international check in desks.
They did not like check through on a QF cash ticket PER-SIN connecting to a QF SIN-KUL award ticket on MH
And complained vigorously about getting called (in/back) if they were to do so.
Fortunately the award ticket was able to be changed to a later MH flight permitting collecting my luggage and walking between terminals
Almost created a problem for my wandering.
Fred