They will have to unless they think consumers will abide a ~30% increase in the price of their phone for no good reason other than Apple wants to continue building them in China.
Could be wrong—but I think the large majority of of phones (iPhones or other) are sold through carriers with already heavily discount phone prices to lure people into contracts, so they’ll be the majority iPhone tariff eaters.
The people walking into Apple and buying a phone outright may not upgrade as often, but that’s a smaller number overall.
The buyers using Apples payment plans are not going to care anyways. If you’re buying an iPhone, especially a Pro Max with a interest payment plan, I’d say it’s a given you got into that position in the first place by not giving to cents about the price of anything.