I fumbled through several guides and was able to get the more advanced menu unlocked, which in turn luckily gave the the PCIe option that prevented this t630 from constantly rebooting after installing an M.2 ethernet adapter.
I have this unit HP T630. I am trying to get an NGFF (M.2 Key A+E to mini pcie adapter/converter) dual ethernet card to work, but it isn’t being recognized. I have tried two different converters with two different dual ethernet modules, but no luck. I was able to successfully flash the bios with the one you attached in your post (flashrom_dump.rar), hoping that it is the moded bios, but it seems it isn’t? The settings I see in the bios are exactly the same as the official HP bios I originally had on the system. I don’t see any advanced menus.
Do you have that moded bios else where? In the moded bios, is the whitelist removed for the m.2 wifi slot? Would you care to share how you got to the Advanced Menu?