Their app store is by definition vetted, this is from their
page. Whether there have been exploits happening in the wild or not.
In 2024, more than 1.9M app submissions were rejected for reasons that include privacy violations and fraudulent activity.
They even have very strict guideline and only allow for sideloading inside EU because of regulation, unfortunately the scanner and the experts didn't catch the harmful app because it's highly sophisticated which means even a strict guideline and review process by experts isn't nearly enough when there are so many moving parts even with regular moderation.
Which is the exacty the reason why iPhone could never be as secure as hardware wallet and saying otherwise is lying because hardware wallet don't host 3rd party app created by stranger from other part of the world.
1st party app beat vetted app store consisting of 3rd party apps any day.