If you are an immediate family member of either an Australian citizen or permanent resident, you may be eligible to apply for a Visitor Visa (Subclass 600).
DHA are trialling an Electronic Travel Authority (ETA) mobile app (Australian ETA) for some ETA-eligible passport holders while the travel restrictions are in place. If you hold a passport from Brunei, Canada, Hong Kong (SAR of China), Japan, Malaysia, Singapore, South Korea or the United States of America.