Probably for some sub-system. None of the suppliers for the peripherals we use (and HW in general) are giving modules written in Rust. Just C.
Consider that for some kind of project, kernels are fixed at a certain version. Producing just Rust modules for new kernels leaves behind a lot (if not all) projects done so far. So if a HW manufacturer has to choose to write and support a driver module then I guess it will still be C, for at least the following decade (maybe?). Unless there is an effort to backport Rust infrastructure for older kernels.
Consider that for some kind of project, kernels are fixed at a certain version. Producing just Rust modules for new kernels leaves behind a lot (if not all) projects done so far. So if a HW manufacturer has to choose to write and support a driver module then I guess it will still be C, for at least the following decade (maybe?). Unless there is an effort to backport Rust infrastructure for older kernels.