Just had a long dance with the call centre. I've been told by two different people that the Perth International Lounge is still "not accepting lounge passes due to COVID restrictions"! Can't link to the Perth QC either if your outbound flight is an international flight.
Hilariously enough, I can link to the Perth QC if my outbound is a domestic flight. So "COVID restrictions" only apply to the Perth International Lounge
I suspect Qantas has decided that the Perth International Lounge will no longer take passes - whether this is an IT problem or not I have no idea.
Had the same issue.
Reasons I was given were the Lounge has only just reopened, capacity limits, owners of lounge temporarily decided to halt the use of lounge invitations.