Ksana Basel (TNW), Bern (Libero) and Zurich (ZVV) are located in three different regional fare networks, therefore network zones are not applicable when travelling between those 3 cities with the respective point-to-point tickets or passes.
See more details here: Such point-to-point multiple tickets are indeed also available from SBB, however only as physical cardboard tickets and therefore not online. Also this kind of physical ticket is a dying breed, they’re supposed to not be offered anymore after 2025.