Pi Zero you mean the original Pi Zero 1 right? Its SoC is driving an ARMv6 CPU.
The most straightfoward way is to try the Cloudflare Package Repository. It should be able to match the OS and arch for you.
You can also try installing the precompiled ARM deb package, specifically cloudflared-linux-arm.deb
directly if the repo does not work.
https://github.com/AnalogJ/scrutiny#getting-started
It will recognize the block devices but not the filesystem construct. That means ZFS pools themselves are out of scope.