While it is techically true that Germany is the biggest natural gas consumer. The difference between Germany, UK and Italy is very small. (https://www.worldometers.info/gas/gas-consumption-by-country...)

And for example, The Netherlands, which is a lot smaller than Germany, consumes half the amount of Germany.

Coming back to nuclear energy, France, a country that is certainly in favor of nuclear energy, has failed to build one since 2002. UK and Finland are trying to build one, with similar lack of success.

So the only option for nuclear energy in Europe seems to be to keep aging power plants running and hope that they don't fail. Not a very attractive future.