u/InternationalFox2392

Hi, this will be my first Euro trip. I booked this Milan to Interlaken train in the SBB app. My Journey would be Milano Centrale > Domodossola (I) > Interlaken

This is what is written on the ticket that I got for the Milano Centrale > Domodossola Leg. I saw that some trains in Italy needs seat reservation. I am just wondering if this is one of those kinds of trains? I cannot see an option to book a seat in the SBB app or whenever I open the ticket thru Trenitalia. Thank you!