Are you flying BR and OZ? BR won’t even allow *A gold + members into the lounge who are flying United during peak hours.

I think these will be challenging entries. Unless you’re flying BR, that will probably be a no go regardless, and ICN technically should be ok, but we know how Asian airline employees are with rules - so you probably want to have the Star Alliance website up with the entry rules and have your physical card with you and be prepared to escalate if denied.