Ended up picking one up in the 2022 batch, as I'm very interested to see what folks build for the device.
As with most of the non-US folks, I had the frustrating experience of seeing the 502 nginx error as the preorders went live (meaning I was there as early as I could have possibly been), had a Playdate and case in my cart within 60 seconds of the shop going live (for the 2021 batch), then spent the next half hour watching as orders outside the US were told they couldn't be delivered, so couldn't be checked out. The 2021 batch sold out.
Playdate/Panic have explained that their partner for international shipping had issues with the traffic on their end, which I get, and are looking at their "options". Not expecting them to be able to do anything - it is what it is. I'm super disappointed that I'll be missing out on the initial "discourse" as everyone discovers their weekly games together, but this is still something I want to check out.