I do agree that both government and platforms have a piece of the puzzle. Platforms have extraordinary insight into on-platform activity, including non-public activity. Governments can have extraordinary insight into some non-platform activity, such as if they can intercept communications or embed human agents in these foreign intelligence services.
For better or worse, platforms have been allowed to and been left to develop their own rules set around what is considered acceptable and unacceptable on their platforms, so each platform has taken a slightly different approach. They have a different language. Some of them are almost quasi-judicial processes. Others are much more freewheeling.
I don't know that there's an effort to standardize all of this, but I do think good communication between government and platforms is essential.