How do I delete selected object I don’t need anymore?
Trim doesn’t fully remove the mesh /Object.
Scene option looks like attached image on a 6in 420dpi device. We’ve no idea which object is there without any thumb or name (given that it’s imported and doesn’t have a identifiable name)
Hmm but the delete button is visible on your first screenshots.
You can simply select a mesh by taping on it in the viewport. Then it will be highlighted on the list.
If you hold the smooth button you can select multiple mesh in the viewport as well.
As for name, it should be imported as well (if it was present). I only support a limited set of characters though.