Those few are implemented as node model nodes. That was necessary so that they can be tied to events and affect the rest of the graph. They can do that because they work on a lower level than ZeroTouch nodes. But in the end all they do is call a second ZT exposed assembly that contains the function that does the actual work.
Luckily, we have the entire source code. I can just take a peek at that, quickly find the right methods and call them from a CBN:
I can’t think of any other solution in our industry that comes anywhere near this level of democratization of functionality 