Anyone know how to add a ESPnodeMCU-32s board option in the code section of Fritzing?
I think most of those code things would be out of date. Maybe try the original IDE.
It looks like that will need some code changes in the application. See https://github.com/fritzing/fritzing-app/wiki/2.3-Adding-a-platform-to-Code-view as a place to start for details.
A board does not get added to code view. A build environment does. In this case, maybe you are looking to add Lua code, plus the interface to be able to send that to the nodemcu boards. Depending which firmware is loaded on the board, I believe that the existing Arduino mode would work.