codex-rs does not run on Ubuntu 20.04, requires libssl3

Codex says that it supports Ubuntu 20.04+ but the codex-rs binaries require libssl3, which is not available in the apt repositories.

$ codex
codex: error while loading shared libraries: libssl.so.3: cannot open shared object file: No such file or directory

$ apt search libssl
libssl1.1/focal-updates,focal-security,now 1.1.1f-1ubuntu2.24 arm64 [installed,automatic]
  Secure Sockets Layer toolkit - shared libraries

codex-cli does work under Node 22 from an external apt repository.