There is a need in of the latest FRR in RHEL9 that is coming from OpenShift Platform. The feature that is needed from FRR is called "Downstream VNI/Single Vxlan device". Some of the code that needs to be present in our version of FRR includes the following:
https://github.com/FRRouting/frr/pull/8647
https://github.com/FRRouting/frr/pull/12364

A couple of options have been discussed including shipping FRR in FDP or rebasing the package. The rebase of the package this late in RHEL9 release cycle is risky but so is the backporting of so many changes in the current version. One option would be to deliver a versioned FRR that would be added as a new package - FRR10. This issue is meant for tracking of tasks and for any investigative steps that are needed to deliver this feature.