iPhone 15 Pro about to be launched in 2023 will be the first iPhone model to ship without a physical SIM card slot.
Apple iPhone 15 Pro and Pro Max models getting launched in 2023 might not have physical SIM card slot. Instead, the devices will only have support for eSIM cards for connectivity.
There will be support for two eSIM cards, for dual SIM functionality. The removal of the SIM card slot will improve water resistance. Not sure if the non-Pro models will also depend entirely on eSIM tech or continue to use physical SIM card slots.