SOLVED: NVMe SSD Controller MAP1202 only 1 of 4 NVME-disks visible

[nvmeraid]

Non-Volatile memory controller [0108]: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1202 [1e4b:1202] (rev 01)

Probe https://linux-hardware.org/?probe=16c8e1d2ea shows Works.

It has four slots but only one NVME disk with id fikwot-f-n203-1tb is found.

[nvmeraid]

Solution: The motherboard must support the PCIE split function, which can set the PCIE X4X4X4
Setting that on BIOS AND also changing the to first socket that support splitting helped.