Could this simply be to provide chips for the products that still haven’t transitioned yet over to Apples in-house C chip.

Like: Apple Watch, most models of iPads, Pro model of phones, etc.

Because without this deal, Apple would have had to transition all products by end-of-year.

This sounds like specialized analog components. Not the modem.

The modems are made by _Qual_comm, not Broadcom.

Different company.