It's still too early for Rust in the embedded space. A lot of that space has various certification requirements that Rust doesn't meet yet, and the rest of the space tends to follow too and is very conservative.

Ferrous Systems is making some good progress to make certification of Rust happen, through ferrocene[0] and other initiatives, but it will take time.

The only company I know using Rust in a sort-of embedded way is SoloKeys[1], using Rust to write the firmware of a hardware authentication token (similar to a yubikey).

[0]: https://ferrous-systems.com/ferrocene/

[1]: https://solokeys.com/