It's not profitable. For example, in Sweden, the companies involved aren't interested. There was talk of EDF being restructured a couple of years back separating the unprofitable nuclear away from their other businesses (until state bailout and investment). Their CFO resigned over their decision to carry on building UK's latest nuclear powerplant. The Conservatives only pushed through the UK's next nuclear powerplant only after giving EDF assurances and ability to start taking in profits before the completion of the project.
This is what it takes to build nuclear. A lot of state money... Whereas renewables are cheaper, easier, and faster to decarbonise.