Followed up with ASRock asking if AMD support was something that may come in the future and they said:

We have reported the problem to AMD but currently AMD motherboard do not support Wi-Fi 7. Supporting Wi-Fi 7 depends on AMD’s plan, if AMD plans to support Wi-Fi 7 in the future, it will be announced on the website.

I contacted ASRock regarding the compatibility of my AMD X570-based ASRock motherboard. According to them, the BE200 Wi-Fi card only works with 600 and 700 series Intel chipsets/platforms, and that AMD platforms do not support Intel Wi-Fi 7 cards.

I’ve got two on the way anyway. I’ll give it a go, and if it doesn’t work, I’ll re-sell on eBay hopefully for a small profit as I got a pretty good deal from Mouser on these.