According to the Senates Estimates transcript (Rural and Regional Affairs and Transport Legislation Committee Estimates) - Tuesday, 25 May 2021, in December last year, Ballina was Australia's busiest airport. Hard to believe really given that Moorabbin recorded 21,378 movements.
The other "gem" from this committee was "a number of incidents have occurred (at Ballina), particularly over the last six months, where there have been close calls between Jetstar aircraft and hang gliders and things like that." Interestingly there is no corresponding "spike" of reported occurrences at Ballina, and what exactly are "things like that".