Yep, Glos Guy is correct. All the cars you list are mild hybrids and therefore have no ability to run solely on electric power alone, even for half a mile.
The 48v label on the Fiat 600 gives it away. Mild hybrids have a beefier battery to aid stop/start and a smoother take off from stationary.
They have no real effect on overall economy but are probably a little easier on fuel on urban journeys than a full petrol equivalent.
About as much use as a chocolate teapot actually. I think the search engine is probably correct.
The clue is not in the title I’m afraid.
You need to be looking for “full hybrid” or “self charging hybrid”
2024 - BMW i4 Grand Coupe eDrive 35 Sport
2020 - Volvo XC40 T4 Inscription
2017 - Audi Q3 TFSi Sport S-Tronic