Arm64/Riscv64/Loongarch64 are ok.
There is a detailed introduction in the wiki.
Detailed: https://github.com/jiangcuo/Proxmox-Port/wiki/Support-List
arm64
riscv64
loongarch64
If you are using server that supports EFI,you can install proxmox-ve with iso.
https://mirrors.apqa.cn/proxmox/isos/
If you are using u-boot device or failed with iso, you can install proxmox-ve from repo.
Head to the wiki page to learn more.