Europe already have plans to be sufficient in renewable energy and will also monitor how much energy a home is using. With such monitoring, yep they can see thru whos doing stuff like crypto mining. If they wanna ban crypto mining, they can really illegalized it.
Unlike China, Western democracies fortunately don't have the foundation for effectively executing such heavy handed legislation. Even if widescale monitoring of individual household's energy consumption becomes a thing in the near future (that is assuming both that smart meters become mandatory and available privacy-preserving techniques become outlawed), increased energy assumption alone would hardly warrant a... well, warrant.
Though it would be kinda funny for a police raid taking place at a suspected crypto-miner's home only for them to find out that they were merely running a cannabis farm.