Sitting in the First Class lounge at LAX waiting for my Nadi flight on the following itinerary as an AA Executive Platinum:
LAS-AA-LAX-FJ-NAD-FJ-BNE-QF-SYD on Business class award ticket
The Junior lounge dragon passed my boarding passes on to the Senior lounge dragon who did not bat an eyelid
The Oneworld Connect status of FJ would seem to indicate that if I was a QF Emerald status passenger then entry would be allowed (from Dec 8 2018) but the FJ website seems to indicate that AA doesn't become an FJ sponsor until the nebulous date of later in Q1 2019 when AA Emerald status from my reading of the vague literature would allow 1st class lounge access
No complaints here though