> Since then, all iPhone models launched since then have eSIM support.

Slight nitpick: Except those in Greater China which ship with dual nano-SIM slots and have no support for eSIM (even on iPhone 14).

iPhone 14 shipped in the rest of the world have 1 physical SIM slot and support for either physical + eSIM or two eSIMs.

I don't know engineering wise why China model phones can't ship with both dual physical slots and support any combo of two physical/eSIM. There doesn't appear to be any obvious technical limitation.