MI MANCANO 2 PROVINCE

[out:csv(::id, name, “ref:ISTAT”;false;“;”)][timeout:1500];
{{geocodeArea:Italia}}->.searchArea;
//admin_level=8 per COMUNI
//admin_level=6 per province
//admin_level=4 per regioni
relation[“admin_level”=“6”][“boundary”=“administrative”]“ref:ISTAT”;
out;

Con questa query mi mancano 2 province: Aosta e Sud Sardegna

Please have a look at the document linked in Fixing divisions in Italy - #4 by Vinzenz_Mai

Region Valle d’Aosta is tagged with admin_level=4 and includes a note=admin_levels 4, 6. So OSM doesn’t contain a province of Aosta.