Qantas Singapore lounge pass if upgraded to Business Class

What happens to my QF lounge pass if my upgrade from Economy to Business from SIN-SYD gets accepted.

The issue is the upgrade could come very last minute yet I can't delink the pass within 24 hours of departure.

Any advice will be much appreciated.

Just a risk you take by linking your pass. No way to get it back as far as I know. I'd just be happy I now have a bed for the trip.

I have had this situation previously flying domestically. My experience is that the pass became available again for use.

As above, when I was upgraded domestically < 24 hours before flight it automatically unlinked the lounge pass.

Good to know. Didn't notice it happening to me in the past but perhaps it has changed. Thanks.

I lost mine after I was op-upd at check in at HK.