Do you actually want wallpaper or are you just looking for an alternative to flat paint? Because if you're really set on wallpaper, there are options designed for humid environments - vinyl or PVC wallpapers are way more resistant than traditional ones! They have this kind of plastic coating that makes them washable and vapor-proof. The trick is picking ones specifically labeled as moisture-resistant, not the cheap stuff: they cost a bit more but last for years without tearing or mold.
But here's the detail that often gets overlooked: wall prep is crucial! If you don't properly seal the surface with a good waterproof primer, the wallpaper resists all it wants but moisture seeps behind it and then things go downhill fast. You need to make sure there's proper ventilation in your kitchen (run the hood while you're cooking) or even the best vinyl wallpaper won't save you.
If the risk still freaks you out though, wall panels or a good anti-mold, impact-resistant paint could be the compromise - they still look modern but without the risks of traditional wallpaper!