I was aware of these but I could have sworn when they came out they at least were only officially supported on ASRock Rack motherboards. That doesn't seem to be the case anymore, or I'm just entirely misremembering.
They do still seem to have the standard ASRock Rack problem of being very interesting to "homelab" and other small volume users but not exactly straightforward to obtain. No one who'll let me buy a single unit brand new has them in stock.
Definitely set an auto-notify on Newegg now that I know they work with generic motherboards, though it's a fair bit more expensive than a NanoKVM it's a lot more appealing to me to actually be a complete standalone internal device that doesn't rely on external wiring to function. The various "PCIe" versions of the PiKVM and its ilk still require an external HDMI connection and sometimes even external power.