QF Platinum benefits on Fiji Airways QF codeshare flights

We'll be travelling to Fiji (ex SYD) soon on a QF ticket with flights marketed by QF and operated by FJ (in Y class) and was wondering if anyone knows if as a QF Platinum member if you have access to the usual benefits such as priority check in, express path and priority baggage handling when checking in with FJ?

Given you've purchased the ticket from Qantas on QF ticket stock, I would say yes - the QFF Platinum benefits will apply and if they don't offer them to you, you'd have a good chance to get them on request.