All iPhones were vulnerable according to the last available iOS support matrix.
To calibrate your sense of time, the iPhone 15 had been released in September 2023 and that doc is dated April 2024, so ~6 months.
And just for completeness, here was the Android doc that leaked at the same time: https://www.documentcloud.org/documents/24833831-cellebrite-...
I'll be amused when Apple finally drops a portless iPhone as the next step ahead.
(Apple already has their Qi2/Magsafe setup, and they already have been using 60GHz wireless USB for quite some time now internally with the Apple Watch for diagnostics and service management since Series 7.)
I don't know, even the latest and greatest is eventually cracked, or they can just hold your device in evidence until the capability is there a few weeks (or months) later.
Furthermore by using an official OS from a vendor like Apple (or Google, Samsung) there's always the possibility that they could target your device with a specially crafted update, especially if you're in really big trouble.