@JUMP The modified BIOS looks correct:
908EA microcode present
ME Corporate Firmware 11.7.0.3307 and set to disabled.
PCIe patched for BGA1440
There is a knowledgeable member of this forum who may be able to help you if the problem is the BIOS mod, so I will tag @dsanke to ask if they could please check that the BIOS mod is ok.
How did you flash the modified BIOS? desolder BIOS chip, SOP-8 clip or SPI header?
There have been reports of problems using the CH341A with some ASRock boards such as this thread:
[CH341a Problem] Which bios_ph1 Cable for ASRock Z270 Pro4?
And also QNCT CPU sellers on Aliexpress:
If your motherboard is ASRock, please do not use CH341A programmer. The programmer has unknown bugs.