For the knobs on the side I have used the knive project tool instead of the shown method. But when I try to bevel the knob surface it was not working. Nothing happens. I also found out that for the other parts the bevel is still in place but in the bevel edge data is set to 0.
As an example you can see that the bevel is in place, but the bevel weight edge data is 0
For the knob in the middle the bevel weight edge data is 1 but no bevel at all