как обновить айфон 7 до последних версий

Sorry, but the built in hardware does not support upgrading your iPhone 7 to iOS 16 or newer.

iOS 16 and iPadOS 16 are compatible with these devices - Apple Support

С iOS 16 и iPadOS 16 совместимы следующие устройства. - Служба поддержки Apple (RU)

Hello,

There are different ways to ensure the highest iOS that your device will support is installed on your device. When updating, your device will update to the highest version currently available that it will support, or it will just say it is up to date (and can't go any higher) and won't install anything. If you want to run a higher system version than your current device is capable of running, you need to buy a newer device.

iPhones 6S through 7, and SE(gen. 1), will only update to iOS 15.8.5