There used to be a "Keyboard" icon under "Peripherals" in KDE Control Center, where you could set basic keyboard options, like repeat rate etc. Now it's gone, I see only "Display", "Mouse" and "Joystick" in there. Reproducible: Always Steps to Reproduce: 1. 2. 3.
kcm_keyboard isn't provided by kde-base/kcontrol but by kde-base/kxkb.
Closing.