but the cloned folder containing C code is named Python.
I have notchecked / verify the Python PC control code.
firmware is written in C.
"python" folder is not used for firmware, it just contains some python tools used for debugging
"doc" folder also is not used for firmware, it just contains some files about NanoVNA, such as schematic, etc.
You can delete "python" and "doc" folders, it won't affect firmware.