I think this one in particular, like many others before it, always fail at replicating the Explorer look. This is probably a limitation in Dolphin and other linux file browsers, but it just doesn't look like Windows Explorer at all to me, it just looks like a ugly vista skinned dolphin.
That's one other thing too (also probably a limitation on a few widgets) like the calendar and system tray, which look more Vista than WinAero/7.
On the plus side it has tabs, which is one of the main redeeming features of Windows 11 for me. It kind of looks like one of those alternate Explorer-replacement tools that were popular for a while. A little ugly, but more functional.