Yea this seems to be a really big misconception. There is nothing magical about pi-hole that requires a Raspberry Pi or even the actual pi-hole software either. It’s just dnsmasq. A generic Linux box running dnsmasq gets you 95% of what branded “pi-hole” gets you.
The software runs fine on a lot of hardware. I have it dockerized (via ansible) and deployed on a couple of regular mini-PCs.
You can run it on a lot of hardware these days, or containerized.