I can start with the positive. I think Australia is seen as a highly engaged partner to Southeast Asia. There are a lot of people-to-people ties, as well as economic ones. In that sense, Australia punches above its weight, given its population size, in terms of being influential in the region.
It also has long-standing ties. Much as is the case with Japan, there is a sense that its diplomatic corps understands Southeast Asia and Southeast Asia's interests.
I'll add that Southeast Asia has been somewhat controversial in the last several years. Australia is part of AUKUS, of course. AUKUS was met with some hesitation in Southeast Asia. I'll say more broadly that there is wide interest in balancing China in Southeast Asia, but there is concern when that begins to look like militarizing the region as a venue for playing out great power competition. I think some nations saw AUKUS as being too close to militarizing the region. Australia got some push-back for that.