So I've looked into it and I sadly bring bad news :(
Apparently, it has to do with the PS5 Store price matrix, and the way they attempt to keep it "equal" across regions. I checked out a handful of regions and it's more expensive than the Steam version in all of them, even in €.
We've always attempted to have Steam make sense in the context of each currency's economy, but we cannot control this one. I'm very sorry :_
Wow, this is really sucks... but thanks for answering, does that mean that on Nintendo Switch it will also be as expensive as on PS5 in the future?
It will depend on the Nintendo Store price matrix, so it's hard to say at the moment. The one thing we know is that the game will be out of Early Access by then (Nintendo doesn't allow EA games in the platform), so our set price will be the final one ($44.99 USD). Now, whatever the price matrix does to it is a whole different story :/