In the US, all versions of the Apple iPhone 16 series support eSIM. They also all support dual-SIM, using two eSIM profiles at a time. However, there is no support for physical SIM cards in the US.
Apple's new iPhone 16, iPhone 16 Plus, iPhone 16 Pro, and iPhone 16 Pro Max models all remain equipped with a physical SIM card tray outside of the United States. Tech specs on Apple's website confirm ...