That's always the case for through stations, I believe. However even terminus stations don't have their platforms locked to a fixed destination. Milan Central station has 24 platforms and each of them hosts multiple routes. Rome Termini has 32 platforms, same thing. You can monitor departures at this link, if you are very patient to keep track of them

https://iechub.rfi.it/ArriviPartenze/en/ArrivalsDepartures/M...

Of course usually the same train departs every time from the same platform. I think that it helps everybody.