Question about the Z890 chipset: are these SATA ports converted from the PCIe lane?

[QyInvoLing]

In this article I found that the Z890 chipset offers 24 PCIe 4.0 lanes along with 8 SATA ports, but I viewed several high-end Z890 motherboards ( ETC meg godlike, aorus xtreme, rog extreme) and I found that none of them uses the chipset to offer PCIe&M.2 slots using 24 PCIe lanes together with 8 SATA ports.

Then I came up with a question: does the 8 SATA ports offered by the Z890 chipset comes from the PCIe lanes of the chipset just like the AMD B650 chipset, which means that motherboard manufacturers can only use (24-n) PCIe 4.0 lanes and offer n SATA ports?  Or, the Z890 do offer 8 standalone SATA ports along with 24 standalone PCIe lanes, but none of the motherboard manufacturers uses all of these lanes?

[pressed_for_time]

SATA ports on the Z890 chipset motherboard do not use PCIe lanes. The Z890 offers a maximum of 8 SATA ports. It is up to the motherboard manufacturers as to whether or not they provide the maximum possible SATA ports or a lower number. Issues such as user demand and available space may be a factor in this.