Passengers will not need to get a test prior to departure to Australia, and hence can proceed directly to the Departures Check-in through the main terminal entrance.
Good news for international travellers as both Singapore and the Philippines are now open for travel for non-citizens. You must complete either a negative rapid test (or a negative PCR test) prior to scheduled departure.
This is within 48 hours for Singapore, and 24 hours for Manila. Rapid tests are conducted either at the airport, or you can bring a compliant certificate with you issued by a doctor.