Australia are 9-0 top, China are 7-2 second, Iran are 5-4 third.
"Aussies have made it anyway,"
Top 3 in group F qualify - Australia cannot go below second. They have qualified, so this is right.
“if they win the rest they still finish top anyway”
Because China have lost 2, if Australia only lose the first through forfeit, they still finish top. This is right.
I don't know why I need to look at the standings?
“How would finishing second or whatever affect WC groups/placings?”
This is the question - are the World Cup groups decided based on their rank how they qualified or their global ranking?
And, would being a top qualifier conceivably put them in a better World Cup group or would it not make a difference?
I’m not really sure how looking at the current qualifier standings assists with answering those questions?