Probably not bigger... it looks like M/V Wenatchee [1] is wider and likely taller, has a much higher passenger capacity, and travels faster (and I misremembered the vehicle capacity a bit). Some of the routes in the system are similar distance than this Norway route, but most are longer, including the one that usually gets the hybrid ferry.

Also, there's a big chicken and egg problem. Can't have electric ferries without shore charging, can't justify building shore power unless there's boats to use it with. There's several ferry routes and individual ferries need to be able to serve multiple routes to allow for flexibility during maintenance, an electric ferry that can only serve one route is not super helpful.

[1] https://wsdot.com/ferries/vesselwatch/VesselDetail.aspx?vess...