Three indicators of a healthy product:
1. Volume
2. Market share
3. Revenue
Apple has 1 of 3 this year
Those aren't the only 3 indicators. There's, for example, profitability. If a product has to be priced so low that it isn't or is barely profitable in order to sell in desired volumes, that would generally be inconsistent with it being a healthy product. There's also customer satisfaction and retention. There's aspirational status or lack thereof.
But, at any rate, I'd argue Apple had all three. A consideration of market share should take into account the market which is trying to be addressed. Evaluating Ferrari's market share by looking at all vehicles sold would make no sense - or, at least, have little utility if the context was considering product health. Ferrari doesn't even try to address the vast majority of the total vehicle market. It only tries to address a tiny portion of that broader market. If a company builds only washing machines, it would make little sense (when considering its products' health) to look at its market share of all appliances.
Apple doesn't try to address most of the smartphone market. It only tries to address the high-end and part of the middle of that market. Its market share there is, by all accounts, pretty good. Perhaps it should try to address all of the smartphone market. But that assessment is about its business strategy choices, not about the health of the products it chooses to offer.
Apple also still had very good volume this past quarter, especially considering what I just talked about - that it doesn't even try to address much of the smartphone market. What company does more volume in the premium smartphone market than Apple? What company is even close?