That is "duplicate line down" -- I want "duplicate line up" which copies the current line to the line above the cursor. My open request been sitting in jetbrains "ignore it" for many many years.
I don’t really get the difference but why don’t you use macros for that?
You can achieve anything with macros and you can give shortcuts to a named macros.
Macros are in the Edit > Macros menu. Add a shortcut to a macro in Settings , Keymap > search Macros, right click on Play Saved Macro and Add Keyboard Shortcut.