I created some more patches and pushed existing patches towards SLFO,
The remaining issues in SLFO are mostly in erlang and old java-17-openjdk. Some less important ones in python313:nogil-base and cephadm.
Plus pending fixes for gstreamer-plugins-rs, librcd, llvm17 and rage-encryption
Plus several issues that do not block verification as documented in https://build.opensuse.org/projects/home:bmwiedemann/packages/SLES-reproducible-builds/files/README

Meanwhile, Factory's gcc15 now supports the -Wtime_t-conversion option to warn about int=>time_t and time_t=>int conversions. While it is a very simple version and shows plenty of false-positives, it also found several actual issues.
e.g. https://github.com/netsphere-labs/anthy/issues/5
     https://github.com/texmacs/texmacs/pull/110
     https://github.com/brltty/brltty/pull/522
     https://build.opensuse.org/requests/1335833
     https://github.com/cern-fts/davix/pull/144