They certainly have a few outliers. They released 12.5.7 in January 2023, which supports the iPhone 5s and 6 - 10 years after the 5s was initially released! How

They certainly have a few outliers. They released 12.5.7 in January 2023, which supports the iPhone 5s and 6 - 10 years after the 5s was initially released! However, that was an outlier; they haven't backported most security patches to older devices. They only do it when there's clear evidence of in-the-wild exploitation or it's a big compatibility bug that would prevent you from migrating to a newer device. Google's announcement was for full OS support for 7 years, not just security fixes. Comparing it to Apple's ~6 years of OS support is fair.