Not sure what you're asking.

There are no guarantees but, historically speaking, apple has generally supported iPhones with iOS upgrades for around 6-7 years, sometimes with an additional 1-2 years of security updates (note the difference between these two. That's from the time the first models are shipped.

For example, the iPhone 12 series was released in October 2020, and 6ish years is October 2026. So, we can hope that the 12 series will get iOS upgrades until October 2026 at least -- that's about 3 years 9 months from now. If we're lucky, there might be another year of iOS upgrades, plus an additional 1-2 years of security updates.

The iPhone 14 series was released in September 2022. Similarly, we can hope that the 14 series will get iOS upgrades until September 2028 at least, or a** bit more than 5 1/2 years from now**. Again, if we're lucky, there will be another year of iOS upgrades, plus an additional 1-2 years of security updates.