Cgroups status (docker)

I was trying to run the precompiled docker binaries on my PC Engines apu2 board with OpenWRT 19.07.7r11306-c4a6851c72. All the prerequisites are there, except for, which I was flabberghasted to find out, cgroup support in the kernel (4.14.221, no /proc/cgroups nor /sys/fs/cgroups). No trace of a kernel module with "cgroup" in the name either, neither in the install image, nor in the repository. But there is a libcgroup in the repository.

So my question is: What is the status of cgroups in OpenWRT? Was I searching for the wrong module name? Or is there a different kernel I could upgrade to with cgroups support?