The image above is for C++ and therefore incorrect
To start with B4x is a transpiler language not a compiler language, the former means that first when you compile the code you wrote is converted into another one. depending on the platfrom it could be Java, Objective C or C.
This becomes an actual advantage for your research, after the code has been transpiled it will follow standard compilation in the target language. if you want to find what happens its easier to find the topic "what happens when java compile" i am pretty sure there are thousands upon thousands of documentation about that.