“Energy from the river” is not the same as the hydro electric power as we know it.
The idea of using natural flowing water as energy source is nothing new. Water wheel to drive mills are several hundred years old, but this is different:
Can this be used in other rivers and streams? Yes it can, without building dams, hindering fish migration and even shipping.
PS> Several small hydroelectric power stations are operating in Norway to supply power to nearby households. Some are over 100 years old but recently upgraded. (But these are dependent on a bit of fall height)
More are planned, some to power hydrogen production.The hydrogen will be used to power ferries, trucks and buses etc. in the near area: