Please iOS iPhone 7plus update thanks you

An iPhone 6s, iPhone 6s Plus, iPhone 7, iPhone 7 Plus, or iPhone SE 1 isn't capable of 16 or above; they require an A11 or better CPU. To install 15.8.3, use a computer or the Software Update function in Settings.

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You can update an iPhone 7 Plus to the latest release of iOS 15 – currently iOS 15.8.3.

About iOS 15 Updates - Apple Support

You cannot update an iPhone 7 Plus to iOS 16 or higher.

Saying "please" will not help.

If you want to run iOS 16, you need an iPhone 8, iPhone 8 Plus or iPhone X.

You have an iPhone 7 Plus. It cannot run iOS 16, no matter how many times you ask.

Your iPhone 7 has reached the end of its iOS software update support and cannot be updated past iOS 15.8.3.

Yes, as everyone else has already noted, your phone is sadly incapable of updating to a higher OS. Sadly, it will max out after 15.8.3.