Well, the CLI tools are not really couple to Proxmox Backup Server and could be built for most somewhat modern Linux distros, quite possibly also other *nix like systems.
The whole tape management is in the common PBS API, so that'd be a bit harder to port but not impossible. For example, I made some effort to get all compile on AARCH64 (arm) and while we do not officially support that currently there are some community members that run it just fine.
So, maybe, but could require a bit more hands-on approach. If you run into trouble you could post in the community forum (<https://forum.proxmox.com>).