There should be a specific Qt/KDE style for Plasma active that would make the traditional apps more touch-friendly (not only the ones optimized): larger font overall (to have larger menu items), larger buttons (bigger gap between the text and the button edges). Larger drop down lists and lists (via larger font)

Maybe could the traditional menu's be automatically turned into a sort of menu button like in Dolphin. That could be created automatically for all KDE app's

Reproducible: Always