What's more current for inputs_for and has_many in liveview?

There’s an article about liveview forms and nested relations here: Nested model forms with Phoenix LiveView - Tutorials and screencasts for Elixir, Phoenix and LiveView

It seems quite outdated, and there doesn’t seem to be any other easily accessible information on the internet. It seems to be a very wordy way of adding nested has_many relations in a form. Is this still the standard way to solve the problem? It seems odd to add a virtual deleted field on a schema, among other things.

Any other links on nested relations, particularly has_many relations in a liveview form?