Italian here and...yeah, it didn't make any sense even for me. So i found the source and the artist only wanted to draw something with the same shape of the region, so for example sicily is a slice of pizza because it has the shape of a slice of pizza, no other meaning.
Maybe someone from Italy can enlighten us who the mascots are. I only recognise Ferrari - Emilia-Romana, Pizza - Sicily, sardines - Sardinia and the seahorse representing the shape of Puglia.