the only mustang recalls here are for 2014-2017 (rear view camera) and 2018-2020 (rear view camera and lamps)
https://www.vehiclerecalls.gov.au/re...t_category%3A7
23C35 looks like the letters haven't gone out yet so the dealer may be jumping the gun. Not clear either if it even applies to RHD cars
https://www.kbb.com/ford/recall/