Can’t see OpenCore boot menu with iGPU HDMI

Hi,

As the title implies, when I open my bios boot menu and choose OpenCore, I can’t see the options such as “Macintosh HD” “Windows” etc.

However, when I plug a HDMI from my iGPU port to my monitor, and a DP from my actual GPU to another monitor, I can see the options. Any way to fix this ?

Thanks !