Italy had 64% for the parliamentary elections in 2022, which is the lowest ever but it's pretty far from 30%.

just to note that if “30% voted for this” participation was roughly 60%

63.9% per https://www.cfr.org/article/2024-election-numbers Which apparently was quite high. Only 3 presidential elections in the past 100 years exceeded 63%: 1960, 2020, and 2024.