11
Well, I don't know what you want to achieve, but it sounds like you want to modify the AST from inside your C++ code (or maybe write wrapper classes for the JavaScript context for them as well?).
I suggest to take a look at the headers file which pretty explains what's there to be used on V8's AST:
https://chromium.googlesource.com/v8/v8/+/main/src/ast/ast.h
~Cheers