Basically, everything shows up twice but /boot (which is not encrypted)
But you can also see some of those items are greyed out, that happens when you right click items and select “hide item”. If you then deselect “Show all entries” in the panel options (i.e. right clicking on the headlines “Devices” or “Remote”) all of those get hidden and won’t get in your way.
I’ve been using KDE for a few months and I’m learning more every day. It is true that I have been using Gnome for many years. It was the problems I encountered with packages like Kdenlive or Freecad after updates that made me take the plunge. Now you have to…