As far as I understand, he was absent from about 2015 on. There was an article, which I can't find right now, that discussed the mess this left the design team in. He basically retired to his home, and he would require the design team to come present to him at some local place (he wouldn't go to Apple). Then he'd give zero feedback. (This is from my recollection of the article.)

Pretty telling since that was sort of the heyday of Apple's devices having all sorts of conflicting designs.

Edit: I think this is the article: https://www.wsj.com/articles/jony-ive-is-departing-apple-but...

With a summary at: https://appleinsider.com/articles/19/07/01/jony-ives-departu...

Furthermore, it's hard to imagine Ive and Ferrari gelling. Ive's style is about as diametrically opposed from Italian design as I can think of. I characterize his design as character-less, something Italian designers don't go for.