How hard would it be to display the operating status (open/closed/full/closing in 30 mins. etc) along with your eligibility, in real time on the QF app?
Dep Location: <MEL>
Flight <JL123>
Lounge(s) Biz <Open>, QP <Closed>, CL <Closed>
Valid fare class <no>
Valid FF/OW status <yes>
Guest entitlement <1>
<Pax good to go>
A couple of API's, a simple display on the phone app. Job done.
Of course all this assumes Qantas has its rules and data sorted out...
Some airports you need to walk for 15 minutes to find the lounge entry (looking at you LHR), only to be greeted by a piece of A4 paper saying "Closed", or be confronted by the lounge bouncers arguing that your OWE status or whatever doesn't apply, when everyone knows it should..
Often the check-in staff don't even know.
Instead of arguing/negotiating whilst frantically searching Google for the eligibility criteria, which may or may not be up to date... show the bouncer the app. If you are ineligible, at least you can ascertain why.