eSIM is supported on iPhone XS, iPhone XS Max, iPhone XR, or later with iOS 12.1 or later.

eSIM on iPhone is not offered in China mainland. In Hong Kong and Macao, iPhone 13 mini, iPhone 12 mini, iPhone SE (2nd and 3rd generation), and iPhone XS support eSIM.

You can find more information on the Apple Support web site here: Using Dual SIM with an eSIM