Bill Swannie (Victoria U) explains 

“Academic freedom requires the protection of academic staff from disciplinary action in relation to public comments made in their areas of expertise, possibly including comments on the policies, governance, or management of the university which is their employer. In several recent and high-profile cases, Australian university administrators have taken disciplinary action against academic staff who make such comments, based on codes of conduct requiring staff to be ‘collegiate’ and to ‘uphold the good reputation of the university’. In the hands of university administrators, wide discretionary powers pose a serious risk to academic freedom in Australia.”

Bill Swannie, “Protection from institutional censorship: an essential aspect of academic freedom” UNSW Law Journal (45) 4 2022, 1489-1512, HERE

Makes a case for universities at least leaving freedom of speech protections in enterprise agreements, what with their having legal force.