Still waiting to get wider availability in other countries. Probably should just wait till Steam Deck 2 at this point
I think I've seen people that can't get their hands on it through "official" means get their own by arranging a delivery through someone else on Reddit for instance. I don't know if you'd be comfortable with that solution though.
EDIT: they are planning to support the Steam Deck long-term, but they said nothing about the first generation -- my bad[1].
[1]: https://cdn.cloudflare.steamstatic.com/steamdeck/images/pres...
Also — check local resellers, some importers just set up a deal with Valve but don’t appear on Steam.