The chinese agree and are calling them NEV's (new energy vehicles)
https://www.byd.com/uk/electric-cars/what-is-a-nev
Not to be confused with ‘neighbourhood electric vehicle’, NEV stands for ‘New Energy Vehicle’ and is a term used to describe all types of electric vehicles, from battery-powered fully electric vehicles to plug-in hybrid cars.
don’t think so, i don’t see anything to support that
like i’m sure byd are using it for marketing but i don’t believe the term is just byd, they are just the most popular
https://en.m.wikipedia.org/wiki/Plug-in_electric_vehicles_in_China