I am OWE through AA EXP and am flying on an AA-ticketed revenue Y fare LAX-HKG-CGK. (I’ve upgraded myself already to J ok the LAX-HKG AA-metal leg)

I get into HKG @ 7am and am Scheduled to fly to CGK on CX Metal at 7pm.

There is a 9am and a 4pm HKG- CGK flight that is showing many seats for sale on EF.

Although I want to eat breakfast at The Pier F would it be possible to do a same-day earlier standby flight change once at HKG? Would I have to inquire at the ticketing desk or could someone in the Pier handle if?

i do not know any CX rules so I need to ask as the flight is next week.

Thanks!!!