Cannot use arrow keys in the alt+tab window to select a program, this is a feature present in all the other DEs like GNOME, also in Windows and MacOS, I need to press tab every time I need to select another window, using arrow keys is faster, because I can press UP and select the previous window more easily instead of cycling over all of them. A curious fact, cover-switch is the only one than let you use arrow keys in KDE.
How is using the arrow keys faster if your finger is already necessarily under the tab key? if you miss, you can go back with ctrl-shift-tab.
Reassigning to the long package which needs to implement it in qml.
*** This bug has been marked as a duplicate of bug 370185 ***