This Anatech article about that new AMD/MediaTek Chip: https://www.anandtech.com/show/16666/amd-wifi-6e-rz608
According to the article the AMD chip is actually a Rebranded MediaTek Chip:
"So here comes the crux: AMD doesn’t make the Wi-Fi module. Through our sleuthing, this is actually a rebranded MediaTek MT7921K module with an AMD logo on it. MediaTek sells the modules to AMD who brands them, but also leverages the regulatory compliance that MediaTek has already done for this product. AMD then takes over custom integration projects, sales, marketing, and support for the module. The RZ608 sold by AMD is in an M.2 2230 form factor and uses PCIe 2.1, although the AYANEO likely is using a more custom integration. There is also Bluetooth 5.2.
The use of the partnership with MediaTek will likely allow AMD to partner its mobile processors with its own branded Wi-Fi 6E solution with OEM partners when it comes to designing devices. Intel leverages the fact that it has Intel CPU, Intel Wi-Fi, Intel Thunderbolt, and Intel Ethernet as a combined sales opportunity for OEMs making devices around an Intel product, so it appears that AMD is leveraging the same ecosystem gains, albeit with rebranded components.
There was an unconfirmed rumor going around the internet last year about a collaboration between MediaTek and AMD co-creating some custom wireless designs, with some reports suggesting that the collaboration will go beyond Wi-Fi. We're not sure to what extent AMD has had any input in the design of the MT7921K / RZ608, or how much that will continue going forward. At this point I'm confident that this sits as a rebrand just for now, given the lifecycle of product development in this area, as well as the Wi-Fi certification being in MediaTek's name."
