They are out there, though the "in Rust" is part of the footnote usually.
I interviewed recently for a 350k+ job involving rust and the odd thing about it was that I'm an okay C++ programmer, but I'm about as good as the average rust programmer because it's not been popular for that long.
Nobody is asking for a decade+ experience on rust, only that you don't run away from it when you hit compilation fights with the borrow checker.
This is not just about Rust though, but because I'm a second systems sort of engineer who can go in replace an aging C++ platform slowly by rewriting bits of it or modularizing it as we go. And the pay matches how badly they want to tear out the tech debt in the rewrite pass (also how horrible it will be for the first 8-10 months).
Serious business obviously still writes in C++ more than rust and so it isn't legacy, but I can see why somebody may not be excited about spending their free time writing C++, and so Rust is the better choice if it gets people excited to contribute.