I have the kodiaq Phev and recently undertook a trip up and down the country with a fully charged battery in hybrid mode , here’s the stats from the phone app to give you an idea of what to expect.
Settings Petrol £1.33 per l – Charging £0.08/kwh (home low rate)
Fuel and charging costs combined £61.11
Av fuel consumption 46.3 mpg
Avg energy consumption 25.9 mi/kwh
Distance 457 miles
av speed 61mph.