That’s sad news because the support was ended before the lifecycle of the machine.
I do understand that NVIDIA may have its reasons for it, but there’s any chance to at least certify the drivers for RHEL 8.10? Why 8.10? Because it’s the latest version of EL8 and it should be available until the end-of-life of EL 8.10. It’s really unfortunate to have CUDA only certified up to EL 8.9, which is no longer supported by Red Hat.