There's a conflation in embedded of IDE as a toolchain assist, instead of as a code or language assist. It's a conflict of interest: Should the IDE be centered around the hardware (Current standard), or the language (standard in other domains)?
For embedded Rust, I've found the Jetbrains plugin to be outstanding. Ie, CLion, PyCharm etc with the Rust plugin. [Here's a minimal STM32 quickstart](https://github.com/David-OConnor/rust-embedded-quickstart) I wrote. It's not tied to an IDE. It uses probe-run to flash and debug.
For embedded Rust, I've found the Jetbrains plugin to be outstanding. Ie, CLion, PyCharm etc with the Rust plugin. [Here's a minimal STM32 quickstart](https://github.com/David-OConnor/rust-embedded-quickstart) I wrote. It's not tied to an IDE. It uses probe-run to flash and debug.