ᐅ Installation of recessed under-cabinet lighting

Hello everyone

My wife and I are about to purchase an Ikea kitchen. Basically, we have planned to use ceiling spotlights to illuminate the work surfaces. However, under-cabinet lighting should be installed beneath the wall cabinets, as ceiling spotlights would cast shadows there.

Now I want to install under-cabinet recessed lights with hidden wiring. Cutting a hole in the cabinet to install the lights is not appealing to me, as I believe this would void the warranty.

So I thought about mounting an additional panel underneath the wall cabinets, which I could drill through and mill cable channels into. This panel should not be visible from the front view.

And here comes (finally) my question: When I define the trim strip and cover strip on the left side of the wall cabinets in the configurator, there appears to be some kind of frame beneath the wall cabinet. Is this actually the case in reality, or is this just an incorrect representation by the planner? If that is true, I could ideally attach another panel “invisibly” behind it.