According to Apple analyst Ming-Chi Kuo, these buttons can act as the Home button first introduced on the iPhone 7, the second and third generations of the iPhone 8 and budget, which cannot be physically pressed but vibrates when touched. The iPhone SE also has such a button, it all works on the basis of Apple Taptic Engine technology.
Kuo doesn’t mention the base iPhone 15 or iPhone 15 Plus, so the two models may remain the same power and volume buttons.
Source: Ferra
