Responding to comment #4. It's a long time since I last used Fedora. So I don't know what they are doing. I do have KaOS installed, and it uses SDDM. When I type the "who" command, I see two entries there. One is for "pts/0" and the other is for "pts/1". Those entries are put there by "yakuake" and "konsole" which I have open. There is nothing there from SDDM itself. By contrast, with openSUSE 42.3 Beta, I see entries where the terminal column shows "console" and ":0". I'm pretty sure that those were put there by GDM (which I use for login on that 42.3 system). I'm still not sure if what you report is a bug or a feature. But since it happens on both KaOS and openSUSE, it is surely an upstream issue.