Yeah they always struggle particularly in these kind of scenarios where there is a smaller sydney team v a non Broncos non-NSW team (which is generally the Storm)
Suspect there will be a lot of people ending up with free tickets later in the week.
Outside of COVID years, I am not sure there has been a public sale of GF tickets this century
When the WA government did the deal with the AFL to get the 2021 GF at Optus, part of the deal was that there be about 15k tickets available to the public.
When they went onsale there were roughly 150,000 people in the queue. And each could buy up to 4 tickets.