Isn't it possible they 2nm are not for Dual Sourcing but for a "Galaxy" version of the chip as they have done on previous years? Also while competition is good, if this is a case of Dual Sourcing, let's not forget the last time Apple Dual Sourced an SoC (curiously with both TSMC and Samsung) it was a chaos as both chips didn't perform on par, leading to noticeable differences between the same iPhone.
The Snapdragon 8 Elite Gen 5 is already in production with TSMC, but a major challenge is brewing. Qualcomm is reportedly testing samples of the same flagship chip built on Samsung's latest 2nm GAA process. This development could trigger a price war and shake TSMC's dominance.