you can try https://firebender.com. Its specifically designed for android studio, but still works well for intellij. I use it every day to develop the plugin itself.
Thanks. I'm already using GitHub CoPilot, but will give this a try.
Honestly speaking I'm not a big fan of chat based assistants, which was one of my complaints about IntelliJ's own assistant. Auto-complete feels more natural, although I can see that the suggestions might be more accurate and to the point with the chat based ones.