eGPU Oculink problem

Hello. I have a problem with the EGPU connected to the laptop via the Oculink connector. The laptop has an adapter in the second M2 slot. The problem is that in the Gpu-z program it displays PCI X2 4.0 instead of x4 4.0. The motherboard definitely supports 4 PCI lines in this slot. Do you think it's the adapter or cable's fault? If so, do you have any proven suggestions? I will be grateful for your opinions and suggestions. Regard

when I replaced the m2 disk with the adapter, Windows did not want to start, but I set booting in the BIOS and it worked. It turned out that the second m2 connector is actually 4.0 x2. I previously thought that both of them were x4 because that's what the Acer employee told me, now the m2 oculink adapter is 4.0 x4 and the m2 disk is 4.0 x2. Thank you for your help and I consider the topic closed