Sorry - totally a mistake - it is SYD-HKG. Just so used to go via SIN and not HKG.
Thanks all for your replies. I’ll make the booking with the two hours wait and then just hope for the best!
While I am visa free my partner isn’t (ostensibly transit visa free but requires visa to enter); so we would have to stay airside if there was any issue.
Wish the connection was longer purely because of lounge time though!
Really appreciate all of your thoughts.