Please branch and build php-pecl-xattr in epel9.
FEDORA-EPEL-2021-cde7f1dba7 has been submitted as an update to Fedora EPEL 9. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2021-cde7f1dba7
FEDORA-EPEL-2021-cde7f1dba7 has been pushed to the Fedora EPEL 9 stable repository. If problem still persists, please make note of it in this bug report.