https://wiki.archlinux.org/title/SHA_password_hashes states that NSA has recommended SHA512 since RHEL 5. This means it's safe to do with wide compatibility. It should be noted that Fedora 35 has started to default to YESCRYPT. See ENCRYPT_METHOD in /etc/login.defs and https://www.fedoraproject.org/wiki/Changes/yescrypt_as_default_hashing_method_for_shadow for more info.