Please branch and build libsodium in epel9.
FEDORA-EPEL-2021-46b54f58b1 has been submitted as an update to Fedora EPEL 9. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2021-46b54f58b1
FEDORA-EPEL-2021-46b54f58b1 has been pushed to the Fedora EPEL 9 stable repository. If problem still persists, please make note of it in this bug report.