Hello. I have exactly the same issue. When I try to boot with kernel 6.9.5, I only get a black screen.
Also using NVIDIA proprietary drivers from RPM Fusion.
The only solution that works for me is disabling rhgb quiet.
A better solution to this issue that has been discovered is disabling the Multi-Monitor option in UEFI/BIOS options, which enables graphical boot to work with LUKS and NVIDIA drivers in the most recent kernels.
This topic was split from ta previous thread that keeps getting added to, if you need more help please reply here.