You can Google Hotwire with Django, or Laravel, or many others (https://hotwire.io/frameworks).
The linked page shows only integrating Hotwire with Ruby on Rails, giving me my original impression.
Framework agnostic but Ruby-only it seems.
If your backend can send templates down the websocket, you can use Hotwire.
Rails has a lot of affordances for Hotwire and is the back end framework for which Hotwire was originally written.
The linked page shows only integrating Hotwire with Ruby on Rails, giving me my original impression.