Nah sorry but no, this sounds like White Australia "swarming Asiatics" alarmism to me. the Aussies getting rid of US bases would impossible because of cultural and racial reasons, and China knows that, as this comment notes

For SEA, the Malaysians and Indonesians will likely agree to distance from the US military — not that they had much engagement anyway — but Singapore and Philippines will never agree. They (we) have too many elites that are tied financially and politically to the sinking ship. Singapore in particular is not only tied with US financialisation but the whole power structure heavily relies on US/UK-educated elite "scholars" who are tested and handpicked from their teens to follow in the footsteps of Cambridge lawyer Harry Lee (as he was known before entering politics). Although they are known to hedge their bets, the Singapore ruling elite is terrified of any one influence becoming too strong. From independence, the party was a racially mixed Anglicised group designed to curb both Malay and Chinese influence, and they will default to that by instinct. A major shift in world balance of power would embolden both Islamic and Sinophone Singaporeans and upset the PAP's carefully cultivated power bases.
Philippine elites, the
class, are even worse, being almost half-US citizens themselves, and would be easier to completely remove than to negotiate with.