I mean I think Victor Emmanuelle II also was partly involved in otl, while Cavour certainly was the brains behind the operation. Cavour and and VE II's relationship could essentially be described as an Italian version of Bismarck and Wilhelm I. Though its a bit of a shoddy imitation since Bismarck was an arc monarchist and reactionary conservative while Cavour was a more liberal man.South Italy was taken byt the 1000 led by Garibaldi and a genoese(Bixio) as a second in command.
North Italy was taken by Cavour who managed to exploit the plebiscite card on 3 countries and reform the army( first army to use trains) making it possible to actually beat the Austrians.
Though certain parts of the Papacy voted against unification I think which was not the result that Garibaldi was expecting.
Yeah though Austria had bigger fish to fry as Hungary was in open rebellion at that point. The government also was in chaos with Metternich's Resignation. Franz-Joseph was busy trying to gain Russian support (which he had to beg for) against the Hungarian Revolutionaries.The only time and actual Savoy tried to conquer north Italy was in 1848 with Carlo Alberto. it's a miracle if Austria didn't force them to release Genoa as punishment after the embarrassing defeat
Also @pls don't ban me I have some good news. I've finished most of the research for the next chapter, so it should be out sometime next week or the week after depending on when my exams are scheduled.