I’m not sure what you are reporting here.
- Generally, Klipper is not well suited for virtual machines. See Running Klipper in a Virtual Machine (VM)
- UART is not meant to be human readable but is a machine to machine connection, i.e. connecting the Klipper host application to the microcontroller on the printer board. See Klipper Architecture / Ecosystem for more explanation
- If you want to delve into the details, start with Code overview - Klipper documentation
- If you just want to install it for using on your printer, start with