Hello Joanne
First of all, welcome to the SBB Community.
There is no SBB Swiss Saver Day Pass. It is simply named ‘Saver Day Pass’.
https://www.sbb.ch/en/tickets-offers/tickets/day-passes/saver-day-pass.html
On its product page, you can find a link to the validity map from where you can see which routes are free:
https://www.sbb.ch/en/tickets-offers/travelcards/area-validity-map.html
To answer your question:
Yes, all your listed journeys are covered by it. However, a Swiss Travel Pass could make more sense.
You can use the ticket even as an electronic copy. No validation needed as you had to select the validity date during purchase. You can walk on the services at will.
Simply have your physical passport or official identity card of your state with you. Photo copies or images on smartphones are not accepted as proof of ID,
Kind regards,
Roland