A lack of stadiums isn’t the issue, utilisation is.
Suncorp Stadium has had 2 sell outs to start 2025.
Between now and the end of September, Suncorp Stadium will host:
29 Rugby League games (with further finals games possible/likely)
4 Super Rugby Games (finals TBA)
2 British & Irish Lions games
4 A-League Games
It is certain that 10 rugby league games will sell-out.
It is possible up to another 10 will sell out, with many at or near.
It is certain the 2 union tests will sell out.
This is just the next 6 months. International soccer hasn't been announced beyond that time.
Games like Brisbane v Wests Tigers are at or near sell out. Inconceivable even 5 years ago.
Capacity and constraint are the issue, not utilisation.