There are a few ways to tackle this.
According to https://community.online.net/t/official-linux-kernel-new-modules-optimizations-hacks/226 they are OK to receive changes to the kernel configuration. Specifically, it says on that page If you are missing some kernel modules or optimizations, give us info about your needs (the best would be .config lines) At the end of that page, a user reported that xz compression was not present in the kernel (an issue with snaps) and it was resolved in a week.
The kernel .config can be found at http://mirror.scaleway.com/kernel/aarch64/4.9.23-std-1/ What needs to change in the .config in order to get proper AppArmor support? What is needed to get ZFS to be compiled in?