Hello gsb
Welcome to the SBB Community.
The FDP for Youth indeed consists of one QR code only, valid for all group members. The code holds the information about the person having purchased the pass. It is sufficient to show this single code. In addition, each member must have their physical ID card or SwissPass card with them.
For cable cars and gondolas where one has to pass a turnstile, normally, FDP for Youth users must go to the ticket window in order to validate the ticket and ‘exchange’ it for free ride tickets. This is the same for Junior Card holders, for example. The same code cannot be used multiple times.
Please address the feedback directly to the cable car operator so they can train their staff accordingly.
Kind regards,
Roland