Dune is 2.39:1. Bars on top and bottom. Greater width for greater peripheral immersion.

The director did not make Dune for your TV, they made it for a theater.

1. Learn why aspect ratios exist
2. Watch TV shows or Made for TV movies if you want content formatted for your TV
3. Crop and zoom if you want a sub-par experience if “bigger is better” for you

Next thing you’ll want is 120fps movies. Truly, learn why aspect and FPS is important, and you may appreciate them more.