I am pretty sure that the government did not directly instruct websites to remove protest footage in the case you are referring to. There is substantial ambiguity in the Online Safety Act, so it is only natural that companies that don't have a stake in what they're publishing will be quick to consider it too risky to show.

This is important, because if your point ever becomes a significant argument against the Online Safety Act, it is likely that the government will be able to retort that it was the online services voluntarily censoring - conveniently ignoring, of course, the context which you and I know of.