I'm not sure what there is to port, but I think from #Rust's perspective it's already available, isn't it? I don't know.
Point is, I just wouldn't use any #Python thing, when there are alternatives available. I might even consider #Clang over #Python, when we are talking about #Microcontroller's, anyway.
If the Pico only allows #MicroPython, I'm sorry for the confusion!