In typical Italian style, the blocklists are actually published as a set of HTML articles on various government websites, that must be scraped and parsed by the ISPs using toolkits like https://github.com/mphilosopher/censura.
The latest proposal now additionally requires acknowledgement through PEC, i.e. domains to block will be sent by rightholders through certified emails to ISPs, and upon processing them ISPs *must* send an acknowledgment in the form of another certified email within 30 minutes, or else sanctions will follow.
This latest proposal has rightfully caused an uproar of the ISPs in groups like itnog (https://t.me/IT_NOG/106605/106606), considering that most PEC providers only offer a few GBs of space, there's already a high risk of ack emails being lost (with subsequent sanctions), not to mention that the concept of automating domain distribution and acknowledgment using email instead of a simple JSON-RPC API is ridiculous, but that's what you get when bureaucrats make technical proposals :)
(Well actually not completely ignoring DoH, there's another not-yet-applied Italian law that requires ISPs to completely ban DoH, but it has kind of gone under the radar since it's essentially inapplicable without DPI (and even then, the upcoming ECH standard will make it practically impossible to block DoH providers that use ECH))
And these are the kind of websites that are blocked so far.
So no. If the government say you shouldn't visit because of <content you don't want to see>, then you don't visit.
The US government released the contents of all the hard drives found in Osama Bin Laden's compound, and me and my friends spent a few days looking through it out of curiosity. A lot of knitting tutorials and old cartoons in there.
Actually sounds quite handy (he said facetiously).
Basically for now the only thing that can put a site on this list is if the website is harming their visitors.