If Apple increases prices outside the US, it will be a PR nightmare.
I already did read stories from media in which this potential global price hike is clearly attributed to Trumps tariffs.
Given that basically every single person outside the US hates the orange, no one will understand why they should pay the price for someone who was voted in the office by the US Americans.
I have been on the iPhone since the first one, since it was not even available in Europe, so I did import it. Usually every 2 years, sometimes yearly upgrades. If they raise the prices they can be sure I won't upgrade but switch to a last year model cycle and generally reconsider how many apple products I want to own.
And given that the US dollar is weaker compared to the Euro since Trump, they will have a very hard time to sell higher-priced phones. Europeans are a lot better informed than the normal US American. They want buy the story that its not the Trump tariffs and then they will ask, why should I pay for that?