The power to "add, copy, delete or alter" data on anyone's devices, even if they don't know the identity of the owner. Yes, they are now legally allowed to hack your device, look at anything you have on it, download it and change it as they see fit.
The power to take over any online accounts, lock the account holder out of it, impersonate the account holder and even do this secretly. They can also edit or delete anything you have posted with the account.
The power to access any networks you may be using in order to "overcome security features like encryption."
You forgot:
The power to "add, copy, delete or alter" data on anyone's devices, even if they don't know the identity of the owner. Yes, they are now legally allowed to hack your device, look at anything you have on it, download it and change it as they see fit.
The power to take over any online accounts, lock the account holder out of it, impersonate the account holder and even do this secretly. They can also edit or delete anything you have posted with the account.
The power to access any networks you may be using in order to "overcome security features like encryption."
Australia’s new mass surveillance mandate https://digitalrightswatch.org.au/2021/09/02/australias-new-mass-surveillance-mandate/