Thank you both for your excellent advise, i will give it a try with another board that has some traces and pads knocked-off on the USB-C connector, so that i don’t feel sorry if i break everything 
About your question Severence on the digitizer, i didn’t replaced it. Basically on the 3 Switches i tried, the original GC PCB was failing with the center of the touchscreen and correctly was reading the game cartridges. I ordered 2 new on AliExpress from “different revision”, and both of them worked. I must admit that even under the microscope, i wasn’t able to spot the difference between the 2 new board. But at least, they are working, so when i will succeed in replacing the LCD connector, it might turn into a working Switch again 