Slightly misleading. Ranges are dependent on the rider weight,inc clothing, and luggage. The tye of weather, the terrain.
So the range is calculated using a lightweight rider wearing minimum clothing,
on very smooth,very flat ground without so much as an incline and not a breath of wind and on the lowest assistance setting.
In reality the riders is going to be average to heavier weight, the ground undulating to pot holey, probably carrying a bag, maybe a bit of shopping. and given most countries have hills, thats going to impact significantly on the range.
Yep, Mirider quote a 50 mile range, to get that you have to ride on flat ground at moderate speed in assist level 1 (from 5)
Ridden more enthusiastically l can rinse the battery in 1/4 that distance, although with a little care l can manage 16-18 miles
Kona quote "up to 60 miles" range on my E8000 equipped mountain bike but l've never got near that, even on the road, in real world mixed on/off road riding l am lucky to see half that figure.