Help needed with Gigabyte X299 WU-8 Bios - Bifurcation

Hello everyone

I was wondering if anyone could modify the Bios of Gigabyte X299 WU-8 with PCIe Bifurcation.
I’m running a 7980Xe. Bios F4 ( Better performance than F5d )
I am running the ASUS Hyper M.2 X16 PCIe 3.0 X4 Expansion Card V2 with a Samsung 970 and I cannot get it to recognize the others no matter what slots I put it in…
The Asus Hyper M.2 is now installed in the fifth Pcie Slot of my Mobo ( x8 );
I could also move it to PCIe Slot no1 . ( x16 ). my GPU is in slot 7.

Any input would be more than appreciated.

Thank you

PS: If I’m not mistaken I believe there’s also a hidden option in the menu allowing to selects pcie port bifurcation for selected slot(s) but it is not visible or accessible in the stock Bios.