So there's rumours that Apple's in-house modem development is going well. It will be deployed in iPhones starting from next year;
Apple is rumored to have been working on its own 5G modem for iPhones since 2018, and it appears the chip will finally debut next year. Apple supply chain analyst Ming-Chi Kuo today estimated that shipments of Apple's in-house 5G chip will reach 35-40 million units in 2025, and "grow rapidly" to...
www.macrumors.com
Right now, Qualcomm is the sole supplier of modems for the ~200 million iPhones that Apple sells annually.
This is reportedly worth about $8 billion in annual revenue for Qualcomm (FYI Qualcomm's total annual revenue is $36 billion). This means if Apple switches all iPhone to in-house modems, it will wipe out almost a quarter of Qualcomm's revenue!
Qualcomm is of course expecting this, and their play to enter the PC industry is a means of diversifying. Acquiring a portion of Intel would be a further step in that direction.