Any owner can see any document related to their strata scheme – even “sealed” legal documents. You are party to the correspondence as an owner in the scheme, regardless of the fact that you are directly involved.
Claims of privacy concerns and “commercial in confidence” issues – the usual excuses trotted out – will be BS.
Your next-door neighbour and even an absentee investor who’s never set foot in the building are entitled to see this too.
I think a polite letter to the strata manager and secretary asking for you to be sent a copy of the document (a reasonable request in these Covid-19 conditions) within the next few days, is in order.
It could also carry a warning that you are aware of your legal rights and any failure to comply will leave you no choice but to commence proceedings at Fair Trading and NCAT against both the Strata Manager and Strata Committee for failure to abide by their legal responsibilites under the Act.