@Burhan294
Option ROM modules like the file named NvmeOpRom.bin can only be opened by using an Hex Editor like HxD. You can download it from >here<.
If you fogot to customize the NVMe Option ROM to make it compatible with the NVMe Controller of your specific NVMe SSD, you should do it. Otherwhise you will not be able to boot off the NVMe SSD.
This is how the related content of the NvmeOpRom.bin looks after having successfully customized it (corrected by me on 05/18/2023):
The “Little Endian” Code you can see (B7 15 19 50) is misleading, but correct (look >here<).
Note: Since you obviously have inserted a wrong (not customized) NVMe Option ROM, you have to redo the integration of the module from scratch by using the original BIOS as source. To avoid a mix-up I recommend to delete the previously modded BIOS.