Please branch and build lib3mf in epel9. If you do not wish to maintain lib3mf in epel9, or do not think you will be able to do this in a timely manner, the EPEL Packagers SIG would be happy to be a co-maintainer of the package; please add the epel-packagers-sig group through https://src.fedoraproject.org/rpms/lib3mf/addgroup and grant it commit access, or collaborator access on epel* branches. I would also be happy to be a co-maintainer (FAS: jonathanspw). I can be the primary contact for EPEL (FAS: jonathanspw).
FEDORA-EPEL-2024-a28021c656 (act-1.6.0-16.el9 and lib3mf-2.2.0-14.el9) has been submitted as an update to Fedora EPEL 9. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2024-a28021c656
FEDORA-EPEL-2024-a28021c656 has been pushed to the Fedora EPEL 9 testing repository. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2024-a28021c656 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-EPEL-2024-a28021c656 (act-1.6.0-16.el9, CGAL-5.6.1-1.el9, and 2 more) has been pushed to the Fedora EPEL 9 stable repository. If problem still persists, please make note of it in this bug report.