I’ve done it for the whole project. I did it last night, made a new blank C++ project from the compiled Editor, then copy pasted all my source files, .h and .cpp and folders into the new directory, and my content, and config.
Still have to deal with any api changes, and I had to add filters in place of my code folders but I did not have to go back and forth making new code from the Editor. I did try that once and stopped as it was proving too tedious.
One thing to note. Name your new project the identical name to the old one, otherwise you can add a name redirect to your config folder, but the project name is needed for Blueprints.