Local models, due to their size more than big cloud models, favor popular languages rather than more niche ones. They work fantastic for JavaScript, Python, Bash but much worse at less popular things like Clojure, Nim or Haskell. Powershell is probably on the less popular side compared to Js or Bash.

If this is your main use case you can always try to fine tune a model. I maintain a small llm bench of different programming languages and the performance difference between say Python and Rust on some smaller models is up to 70%