Yes, an EOR can support operations in multiple countries at once. Australia and the Philippines both changed a payroll rule last quarter. Who told you?
An offshore bookkeeper in Australia can keep your books. Only a registered agent can sell you a BAS service, and the Federal Court just priced the gap.
Can you onboard contractors through an EOR? Yes. The ATO is now matching your payroll data against what the fund received, and the letters have started.