Is it possible to modify the code to the Metahuman Creator itself?

I have a few things I’d like to change and add on to the program (such as a more detailed full-body creator as the current one has less detail than literally the Skyrim character creator), and I’m not even sure if it’s possible to do this. I apologize if this is obvious, I’m a newbie and don’t really know if it’s possible. Thanks in advance!

Sadly there is nothing to modify, it is online only app in server farms. If internet goes then Metahuman vanishes to thin air so to speak.