After custom kernel build wlan is not working

https://www.peak-system.com/PCAN-USB.199.0.html
https://www.elektor.de/pican-2-can-bus-board-for-raspberry-pi

i use this 2 devices. if the Kernel CAN modul is enabled and for the pican is the devicetree configured then CAN is working. (I use this on raspberry pi and bbb or debian on my laptop) but without the CAN in the Kernel network stack, it dosent’t work ;o)