I do not see the option "different widgets for different desktops" that has been under "virtual desktop" settings...
I understand that the UI is not finished but I am pretty sure there is a config file somewhere ...

How can I enable this functionality again?

thx, piedro

maybe you should consider using activities https://www.reddit.com/r/kde/comments/2 ... h_virtual/

https://bugs.kde.org/show_bug.cgi?id=341143