Hello Shourouphex26
The Friends Day Pass for Youth has the same range of validity as any day pass and is only valid to inhabited places. It does not grant any further reductions, with a very few exceptions for mountain excursions being Mt. Rigi, Mt. Stanserhorn, Stoos, Klewenalp, and Rochers-de-Naye.
You can find the area of validity map on its product website:
https://sbb-tickets.cc/en/tickets-offers/tickets/day-passes/friends-day-pass-youth.html
If you do not hold a (Swiss) Half Fare card in addition, you will have to pay full fare tickets for the cable car.
Kind regards,
Roland