Unable to Check for Update?
An error occurred while checking for a software update. Who have The Same Problem?
iPhone 11
If you included more detail it would be easier to decide which reason to post. Most recently, Apple issued an update and then withdrew it. You may get a false notice: https://www.macrumors.com/2023/07/10/apple-pulls-ios-16-5-1-macos-13-4-1-rsrs/