I didn’t see options to update my iPhone 7 there is no network on it for 3 days now
I couldn’t update my iPhone 7
iPhone 7, iOS 14
Question marked as
See this link -> If your iPhone or iPad won't connect to a Wi-Fi network – Apple Support (UK)
If that helps, you will be offered an iOS 15.7.3 software update for you to update.
If not, update your iPhone using a computer with Finder (Catalina or later) or iTunes installed.