Protip: if you ask a volunteer to test a kernel build for riscv64, make sure that you have actually built it before you ask
The #AlpineLinux linux-lts kernel finally has #riscv64 enabled https://git.alpinelinux.org/aports/commit/?id=d106e5949469
It might work on VisionFive v2, but I have no idea if it actually does.
Turns out that it boots!
@ncopa coool, thanks for the effort!