Hi @adrianf0
Would love to know that as well, but unfortunately, Swisscom did not yet announce official plans or a timeline to roll out IPv6 to the mobile network.
There is a quite long discussion about this in the german version of this forum, unfortunately also without any results.
The only way to get IPv6 connectivity at the moment, is to use a VPN/Tunnel solution. (i.E. Apples private relay which offers dual stack)
Best,
r00t