I think I used this one:
https://www.jaycar.com.au/mains-adaptor-24vac-1a-unregulated-bare-ends/p/MP3032
Then just soldered on the plug.
It was an early gen Rachio, they might have gotten their shit together and be offering international options for plugs now though. Swapping them for whatever country it’s going to. Pretty silly if they aren’t.
Let me know if you need a hand.