Hi, I found this git issue that has been closed
https://github.com/k3s-io/k3s/issues/6611. According to this k3s is compatible with Rhel 9 version. Even when I tried to setup k3s over rhel 9.1 it worked. Could you please let me know when or why use support matrix will include Rhel 9 user like us to upgrade to Rhel 9 from 8 with K3S