Where does the heat come from to warm the cabin, I used to have an ioniq phev and it fired up the engine to heat the cabin, noticed the Octavia today didn't, but was blowing warm air. 

There's an aux heater in car that runs off battery. Don't think is same standard as a heat pump on the full evs.

 

You can use it to warm car up via app before you get into it

Cheers, wasn't too sure this was standard on an added extra.