These scenes are not in the Disney+ 4K stream (which is the Theatrical). The only way to own the 178-minute cut physically is via the BluRay or a specific digital code.

: The longest version, adding 16 minutes to the theatrical runtime (~178 minutes). Key Extended Content

The discussion around "Avatar" (2009) encompasses a wide range of topics, from filmmaking technology and environmentalism to cultural representation. Depending on your specific interests or the requirements of your paper, there are numerous avenues to explore in depth. If you have a more specific topic in mind, I'd be happy to help with more detailed information.