Unable to update my iPhone 8 Plus to latest iOS version

An iPhone 8, iPhone 8 Plus, or iPhone X isn't capable of 17 or above; they require an A12 or better CPU. If you're trying to install 16.7.12 or update applications compatible with it, describe what happens.

(262522)

iOS 16.7.12 is the latest version of software for the iPhone 8.

What iOS version do you now have installed?

It seems you're interested in updating your iPhone to a version higher than iOS 16 (major or minor version), which is already installed as per your profile. Perhaps you're encountering limitations with apps that require iOS 17 or higher.

Apps that require higher iOS versions than your device can be updated to... - Apple Community