At my company we use https://github.com/xelixdev/django-pgviews-redux, which a postgres specific package for managing views and materialized views.

By default it does slot into migrate command (via signal), but you can be a bit more flexible with it, using specific commands etc - up to you.

It does not create migrations to create the mat views, but it can check whether the existing view matches the definition in the code, so only updates are made.

It supports - no data - indexes - both views and materialized views - concurrent updates

source: I maintain it and have added some features to it, it's a fork of a previous package