I've added links to bugs for build requirements that have bugs about packaging them. Unfortunately python3dist(werkzeug) is also not packaged but required and i can't find an obvious candidate for it.

werkzeug is from https://src.fedoraproject.org/rpms/python-werkzeug

I have opened a bug requesting python-werkzeug for epel9
https://bugzilla.redhat.com/show_bug.cgi?id=2094551

Will you be able to branch and build python-flask in epel9?

If you do not wish to maintain python-flask 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 on epel;  
Please add the epel-packagers-sig group through https://src.fedoraproject.org/rpms/python-flask/addgroup

I also wouldn't mind being a co-maintainer of the package. (FES: tdawson)
Please add me through https://src.fedoraproject.org/rpms/python-flask/adduser

FEDORA-EPEL-2022-92cf201fcd has been submitted as an update to Fedora EPEL 9. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2022-92cf201fcd

FEDORA-EPEL-2022-92cf201fcd 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-2022-92cf201fcd

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

FEDORA-EPEL-2022-92cf201fcd has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.