A simple solution is to lay an additional sheet of plywood where the range is to be installed. The face of the plywood can be covered with a decorative strip to match the kickplate on the surrounding cabinets, or if the range comes with a stainless steel kickplate, the kickplate itself can be extended / replaced by a taller one.

We have done this several times for our clients for the same reason, no issues in daily use. The only downside is that the range needs to be "lifted" onto that platform when installed or during service. It makes it a little more challenging, but not impossible.

Alternatively Viking might sell taller legs / frame, but I'm not familiar with that.

Patrick