I’m assuming what you mean by “nothing happens when you press the bypass switch” is the bypass and tap leds are not working…is this correct? If they don’t work then don’t worry about the jumpers yet….let’s get them working first.
Pin 1 on the micro is the pin with the square pad, so pin 3 is just 2 pins down from that one on the same side of the chip. Pins 8 and 22 (the pins you noticed were always connected to ground) are the chips ground pins and should be connected to ground. We only care about weather pin 3 is connected to ground when the bypass switch is pressed. The same for the tap switch and pin 4.
In your previous post I couldn’t tell what you were saying about what pins 3 and 4 were doing. Let me know if those pins (3 and 4) are connected to ground when the button is pressed AND not connected to ground when the button is not pressed. The pedal does not need to be powered to do this test.
-Brach