Hey Dmitry, you might want to take a look at this: support multiple livesockets by gfrancischelli · Pull Request #3564 · phoenixframework/phoenix_live_view · GitHub
Related to that, I’m working on a way to take this a step further and use LiveView for embedded widgets. The difference in that approach is that the owner of the main page would be a third party. Maybe there is some overlap and it could solve both problems. You can take a look at the proposal here.
