Im not from Sydney or even NSW and know nothing about western sydney public transport so can’t comment either way about this info, but included for info as I received it today
Western Sydney International (WSI) Airport
WSI Airport will be open to passengers and the public from October 2026. However, commencing from
Sunday 5 July many of these new services will provide the opportunity for staff and workers across Western Sydney to commute to and from the Airport. Should you wish to interchange for any other services, you can do so at the WSI Airport bus interchange.
Learn more about getting to and from Western Sydney International Airport.