Hello. I will be traveling by train from Milan, Italy to Lucerne in June 2022. I would like to take the Gotthard Panorama Express Scenic Train from either Locarno or Lugano to Lucerne as part of this journey. If I book a one-way trip from Milan to Lucerne, with either Locarno or Lugano as one of the stops, will this guarantee that I board the Gotthard Panorama Express train into Lucerne, or is that a separate ticket that I need to purchase?
Thank you in advance for any assistance.