Also waiting for my Steam key, I've had my Steam account linked with itch.io and have yet to receive a notification here, on Steam, or an email detailing how I'll receive it. Hopefully we figure out something soon!
Hi, the Steam key should be available in your Itch library after you click "Download" (under your Void War purchase). More details on how to access it here: https://itch.io/docs/buying/already-bought