Ios15.2.1
Since the update the Wi-Fi icon has disappeared whilst it is still concerted to the internet also when trying to look at the news it reports not connected to the internet
iPhone 5s, iOS 12
See the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT204051
Recommended settings for Wi-Fi routers and access points
https://support.apple.com/en-us/HT202068
If you need help with your Wi‑Fi password