The French national gas distribution company was talking about a significant reduction in industry consumption of 23% compared to 2018-2019 (to exclude covid), even when adjusted for weather.

https://www.grtgaz.com/en/en/our-actions/continuity-of-gas-t...

I haven't found a similar source for electricity, though articles I've seen talk of reductions, too.

Well, the government asked them to consume less so some reduction is expected.

The part of the claim you have taken upon yourself to substantiate is that the reduction is mainly (or even mostly) due to industry getting closed down completely or relocated specifically to the US.