Asrock provided me a bios for B450 Pro4 R2.0 with updated secure boot key.
(it has 2011 and 2023 together).
I put it here for everyone else that want it. (i split it for uploading here)
B45P4T10.43A.part1.rar (5 MB)
B45P4T10.43A.part2.rar (5 MB)
B45P4T10.43A.part3.rar (208.3 KB)