I’m not a developer, but I doubt it. They are unrelated home automation systems.
You could possibly use the home assistant integration as the basis for an integration with Hubitat. But you’d presumably need to rewrite the code to actually run on Hubitat.
Edit: you should take a look at home assistant device bridge. That’s how most people bring devices from home assistant into Hubitat.
Home Assistant Device Bridge is how I bring over local access to the Ecobee Thermostat. Got tired of the Ecobee API in the cloud having issues in the past. That is the only integration and service I run on Home Assistant. Everything else is local to the Hubitat's.
If I'm not mistaken, I believe some have used ChatGPT to get a half-decent starting point in Groovy by asking it to use Python code as the reference.
However, Home Assistant Device Bridge is the easiest way most of the time, and far more useful in the future when you want something else on HE that is only written for HA.
Thanks - looked at this briefly just now - does this mean I can point the app at the UI for the switch, and it will discover all available commands for it?