It is a huge problem, that's why Intel sold the business 5 years ago in the first place.
Apple bought it and planned/hoped to get something workable and migrate to it years ago, but they couldn't... so they were forced to sig a new deal for Qualcomm modems.
Qualcomm isn't some small business Apple can just run over, that's why this has been so difficult for them. Qualcomm have very good lawyers and billions to spend on them... which is exactly what they did a few years ago, and Apple finally had to settle with Qualcomm and give them billions for a new deal for modems into 2027...
It looks like next year might be the debut of the Apple modem, but it'll likely be less performant than Qualcomm. Sure, it'll work... but it won't be the best and that's why they're putting it in the budget phone first.