It is the 5th via 7th century CE when outer structure and appearances of Hindu temples in north India and south India started to broadly diverge. It is also thought that this temple has Swayam-bhu of Lord Hanumana meaning that Hanumana himself had appeared right here. It is also stated https://hindutempleinadelaide.wordpress.com/2025/02/17/the-significance-of-lord-hanuman-and-his-spiritual-presence-in-australia/