(Disclosure: I work at Canonical and wrote the cargo-auditable support.)

Good catch. The list of binaries is on the 26.04 release notes if you are curious: https://documentation.ubuntu.com/release-notes/26.04/changes...

The cargo-auditable support is specifically to make it easy to turn on cargo-auditable for Rust packages built using dh-cargo. Most packages use dh-cargo, but not rust-coreutils, so we would have to manually wire it up.