Hello KayP2025
Your question is not related to the above topic.It is advisable to open a new discussion with every new question. Also, please do not ask the same question multiple times; you are doubling our work.
These tickets are only available at the ticket desk or from the Jungfrau website.
We do not recommend the prepurchase of tickets for Jungfraujoch. Simply purchase it at the day of travel.
See: https://community.sbb.ch/d/35049-jungfraujoch
Kind regards.
Roland