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For anyone facing a similar issue, I was able to resolve it by placing all JS files created in the build.
I noticed there was another file runtime~main.[number].js being created when a build was created. I had skipped this file earlier based on the how the other React "apps" were added to static folder in Django app.
Placing this build file along with the other JS files allowed the app to attach to Django and load properly.
Source:stackexchange.com