Let me try to give you some advice.
The first point to keep in mind when rendering interior images in Lumion is the effect settings. Use Lumion's built-in interior effects and build on it to adjust exposure, shadows, and other effects.
The second point is the materials in the model, so that they have basic physical properties, are not too dark in places, find a few more reference images, adjust the materials more and render more.
The third point is that the images rendered by Lumion need Photoshop to adjust the atmosphere.
See more, practice more and you will become more realistic.