I'm pretty sceptical that Apple would've settled the Qualcomm litigation without some sort of agreement that Apple wouldn't go back and re-litigate later. Even if they did, more litigation would put Apple in a real bind to try and find a new supplier for something Qualcomm now almost has a monopoly on.
If Lucy Koh's decision is upheld, QCOM has to re-write all their existing licensing agreement.
What monopoly? There are at least two other 5G chip makers, Samsung and Huawei and according to a fairly reliable Apple analysis Ming Chi Kuo, Apple will use both Samsung and QCOM's 5 chips next year.
