That will mostly be up to the wallets which integrate Portal: our device is built with BDK, so we can support singlesig, multisig and complex descriptors (although some functionalities are not yet exposed in the firmware).

The apps can then build whatever user experience they want on it, taking advantage of the features we expose.

Unfortunately we can't replicate a UX similar to FrostSnap because only one device can be powered at a time.