First of all it's wccftech, not quite the most reliable source on the internet.
Beyond that, the quote is from a part were they are talking about the X370 chipset. They are saying that on X370 boards, there will be two lanes which are capable of PCIe x16 Gen3 speed. What i guess they are meaning here, is two SLOTS capable of x16 speed. Because two LANES that are connected via pcie LANES? Makes no fucking sense.
Additionally they don't mention the CPUs in that part at all except for them having an unlocked multiplier.
And according to most sources i found, for example Caseking and a LTT video directly from the AMD press event they are talking about 24 PCIe lanes.
(yes LTT is a lot of "show", but in tech specs he is pretty much always on point)
https://www.caseking.de/en/amd-ryzen-7-1800x-3-6-ghz-summit-ridge-socket-am4-boxed-hpam-116.html
video @ 1:14