The following Apple iPhones support eSIM:
- iPhone 13 Pro Max, iPhone 13 Pro, iPhone 13, and iPhone 13 mini - Dual SIM with either two active eSIMs or a nano-SIM and an eSIM
- iPhone 12 models, iPhone 11 models, iPhone XS, iPhone XS Max, and iPhone XR - Dual SIM with a nano-SIM and an eSIM
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 feature eSIM.
You can find more information on the Apple Support web site here: Using Dual SIM with an eSIM