https://github.com/mkj/sunset/tree/main/embassy/demos/picow is a wifi-ssh to serial impl for a rp2040. I've got it plugged into my home server's serial port. It's using cyw43 for wifi also from Embassy - dirbaio is prolific! There's some WIP in Embassy for bluetooth.

That repo has a few crates depending on each other - sunset is the toplevel ssh, sunset-embassy adds no_std async, then the async dir has std rust, with a commandline ssh client in the examples dir.