>Nearly no one I know in NL and DE works more than 36hrs per week.
You mean 36h in a full time employment contract or by self reported work hours or is it part time work?
> I am talking here solely about my white collar bubble
Well from where I am in the EU and across other people I know in EU, for white collar jobs 40h contract is the norm in most places for most people I know. 36h is kind of an exception in select few fields in certain high-welfare countries with strong unions(German IG-metal for example in Germany, Airbus in France, etc), so you could simply be biased by a privileged bubble that isn't the norm in all of Europe.