Originally Posted by
kamadzu4
Was gonna reply with more confusion, but then saw you edited the post. Yes, it seems that QF is specifying "class of service" just for QF and EK, while the last section for oneworld riffraff has the status as well as oneworld class of service...
Edited again with OW rules reference:
https://www.oneworld.com/airport-lounges?location=SIN
See the Access for F and J passengers sections at the end.