Cannot get Klipper to connect to my new Kingroon KP5L

I would not recommend to install a ARM architecture optimized distribution on a general purpose machine. Although it should work, I’d not take the chances. There is a reason why there are different Linux distributions with different targets.

Might make sense to go step by step, especially if you are a beginner.

Check Debian Bullseye Bug causing Klipper to no longer find the printer board