It seems there are plenty settings now, but I cannot find one for upstream release monitoring. IIRC it has been there in older versions.
No it was never part of pagure itself, it is now controlled in https://pagure.io/releng/fedora-scm-requests using pull-requests (cf the last section of the README Anitya settings)
Anitya settings
Going to close this ticket as invalid since it does not concern pagure itself.
Let me know if I can help some more.
Metadata Update from @pingou: - Issue close_status updated to: Invalid - Issue status updated to: Closed (was: Open)