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I don't think that "shall" is correct grammar in that context."you should be eligible for lounge access".
What tripe. You "shall" be eligible is definitive, "should" is an empty statement.
Out of curiosity, is there anything in the QF app about relaxing in the lounge? eg here’s an example from one of my future trips.I'm WP flying SYD-AKL-PPT on a QF ticket in Y.
Was it determined whether I'll have lounge access in AKL?

