That's what I had assumed, so I just wanted to remind you that this thread is about the new WiiM Amp Pro, not the WiiM Amp.
You can order in from WiiM on amazon.com right now. But it still shows as "temporarily out of stock". It's not been in stock, so far, as fare as I know.
Yes, the WiiM Amp supports AirPlay 2, but the WiiM Amp Pro, just as the WiiM Ultra, does not. I mentioned it before, but I know for sure from 1st hands experience that the Ultra is technically capable of supporting AirPlay 2, but support was removed prior to general availability. I'm pretty sure that the same is true for the WiiM Amp Pro, carrying over important parts of the Ultra. Whatever has happened between WiiM an Apple, that story did not come to a happy end, yet.