Many of the Australian banks are starting to clamp down on crypto transactions due to scams and ransomware. Some of them won't allow transfers to "high risk" exchanges, whereas others are stopping them altogether.

https://www.bendigobank.com.au/media-centre/bendigo-bank-blocks-high-risk-crypto-payments-to-protect-customers/
https://www.commbank.com.au/support/security/cryptocurrency-payments.html
https://www.westpac.com.au/about-westpac/media/media-releases/2023/18-May/
https://news.nab.com.au/news/scam-strategy-update/