WW2 Italian Field Artilery is an big gap and Strelets have given us some great artillery sets for 19th/20th century conflicts recently so hopefully will consider this set too. Also yes to Italian Infantry in sun helmets and maybe also a set of Italian Askari ( Libyan for North Africa or Eritran for East Africa) as these troops made up a large part of the Italian forces in Africa.
Here's another vote for WW2 Italians, and field artillery in particular.
Apart from metal, there are field guns (of French and Austro-Hungarian origin) available in styrene but the 75mm Cannone da 75/27 mod.06 is lacking. It could be used for WW1, WW2, the SCW, and in many armies since their Krupp guns are very similar.