@freezenet Skimming it, some things jump out:

"content that advocates self-harm, disordered eating or dying by suicide or that counsels a person to commit or engage in any of those acts"

Would euthanasia fall under that?

"if it is reasonable to suspect"

From "content used to bully a child". At scale in particular, what would that mean?

It appears to conflate some erotic literature / porn with victimization, even if the person being "victimized" does not exist. There appears to be a vague "artistic" exception, but I don't think that is sufficient (and it is constrained by vague "risks").

6 1 In theory, the legislation does not appear to apply to private messaging contexts?

55 1 "The operator of a regulated service must implement measures that are adequate to mitigate the risk that users of the service will be exposed to harmful content on the service."

"91 (1) Subject to subsection 92(1), an inspector may, for a purpose related to verifying compliance or preventing non-compliance with this Act, enter any place in which they have reasonable grounds to believe that there is any document, information or other thing relevant to that purpose."

7 2 It partially allows for mandating upload filters and other such things (a "Commission" appears to be responsible for dictating this).

Those bits might be of interest, although there are probably other things in there.