Make does not find kernel header on Venus OS - please help!

I’m using a Raspberry 4 with Venus OS and need to integrate a USB driver for the CH348 chipset installed in a “Waveshare USB TO 8CH TTL”. The driver must be compiled for Venus OS. But with the existing package manager I can’t get a kernel header for the current version:

opkg install linux-headers-5.10.110-rpi-venus-4

This causes me to get the error message during compilation:

make -C /lib/modules/5.10.110-rpi-venus-4/build  M=/data/home/root/LINUX-2/driver  
make[1]: *** /lib/modules/5.10.110-rpi-venus-4/build: No such file or directory.  Stop.
make: *** [Makefile:7: default] Error 2

How can I install the current header for the 5.10.110-rpi-venus-4 or integrate a driver for the CH348 chipset into Venus OS ?