Last week #syslog_ng 4.12.0 was released. It comes now with RHEL RPMs next to DEB packages. My versioned #RHEL / #Fedora and #openSUSE / #SLES repos are still prepared:
Note that my RHEL 10 build failed and needs investigation.

Installing latest syslog-ng on RHEL and other RPM distributions
The syslog-ng application is included in all major Linux distributions, and you can usually install syslog-ng from the official repositories. If the core functionality of syslog-ng meets your needs, use the package in your distribution repository (yu...