Motherboards and BIOS PCIe bifurcation required

Description of PCIe host adapter to SFF-8643 states the above. Could anyone provide what exactly needs be done?
Linkreal 2 Ports PCIe 3.0 x8 Host Adapter Card for U.2 (SFF-8639) PCIe-NVMe SSD - Newegg.com

Berton said:

Might read this:
Why do we need PCIe Bifurcation and how?
I've used a PCIe X1 card in a PCIe X16 slot without problem but that computer is now gone.

The statement shown in the title appears to not mean what user has to do but the motherboard and its BIOS support bifurcation. And if it does not, there is nothing user can do about it. Is this correct?

Dude said:

The specs you show for MB show PCIe2.0, the addon requires PCIe 3.0, but is backward compatible to PCIe 2.0

My motherboard is Gigabyte AORA 570X Ultra and it supports PCIe v.4.0. But it will backward compatible with the PCIe v.30 card.

Dude said:

You will be good then, please update specs

Please check the following and correct me if wrong.
X570 AORUS ULTRA (rev. 1.1/1.2) Gallery | Motherboard - GIGABYTE Global

Edit: Sorry I have not mentioned but this thread is about my newly assembled PC which I am trying to make working. The above motherboard is used in this machine.

Dude said:

Page 32 in your manual for BIOS, looks like your good

Thank you for calling my attention to the manual. I have just reviewed it.
What I am trying to do is to use PCIe x8 slot for two M.2 NVMe SSDs. Does what the manual say mean bifurcation is supported only for x16 slot?