I’ve been working with Blender and Unreal for the past week and am still blown away by how well they work together. For me, I export with Face smoothing in tangent space and it works perfectly. I’ve done some stuff with rigs and animation that have all worked perfectly. Once I have the objects in Unreal, I can still go back to Blender and make changes. All I have to do is export on top of the old fbx and tell the object to reimport in Unreal.
Anyhow, I digress. Your stuff looks good but it looks like you’re missing a shadow under the legs of the table and far chair. Your room looks a bit flat. Think about where light would be coming from in the real world and try to emulate that.
Hope that helps!