Cause and Effect
I don't the article gives the correct order or causality of events.
I don't think that Intel gave up on 5G because Apple suddenly feel back in love with Qualcomm.
I think that Apple was forced to eat humble pie and go crawling back to Qualcomm offering several fist fulls of dollars to buy peace because Intel could not deliver a competitive 5G solution in the timeframe required to keep iPhones competitive.
This is based on my memory of articles I read at the time, and as in all things, I might be wrong.