Switching 12V load with N-channel mosfet working with 5V

[newtekuser]

Pinout of your PMOS is different from pinout in KiCAD (and PCB). Source and Drain swapped.
NPN also have different pinout (C and E swapped)

Thank you for pointing this out! The footprints and symbols I used don't match the pinouts from the datasheets.
(my fault for mixing and matching symbols from KiCad with 3rd party footprints)