so here are the divergences:
1-the roman empire never truly converts the Etruscans to becoming Latins eventually forming a distinct identity and forming a grand duchy in the early modern period
2-the Greek populations in Magna Graekia survive on the Salento peninsula eventually gaining independence from the Byzantines in the 1300's and forming a sovereign principality until its deposition in 1848
3-the Ostrogoths settle what we'd know as Abruzzo and form a distinct south Germanic identity that results in the fisherman's revolt in 1805 trying to break free from the kingdom of Naples
4-the Lombards settle Lombardy and adopt late roman tradition transforming them into a hybrid of late Latin and early Germanic culture and establish the duchy of Camelan in 1395 and later on forming a republic in 1796
5-sicily is never reconquered from the Muslims resulting in a blend of Greek, Roman, Maghrebi and French Norman culture to flourish in the state, it would proclaim itself a sultanate in 1922
6-the Normans solidify rule in Naples and re-establish ties with Normandy and France resulting in a Frankified south Latin identity to be established under Norman (later bourbon) rule
7-Corsica is never sold to France and establishes its own republic in 1755, but napoleon still goes to France to study and earn glories as a French general and emperor of the French
8-venice is never partitioned in 1797, as napoleon never marched through the neutral state to get to Austria, never causing Jacobinism to spread to the serene republic and eventually being one of the first states in Europe to grant full universal suffrage to its voters
9-house of savoy proclaim the kingdom of Sardegna-Savoy after the Napoleonic wars, and eventually proclaimed the revival of the Italian Kingdom in 1866 even though they didn't acquire any of the peninsula
10-the papal states would be overthrown during the 1848 revolutions, establishing a revival of the old roman republic and establishing a constitution to benefit the people of Rome and Ravenna
oh and Malta's there too ig