If your iPhone 17 says Wi‑Fi is connected after the iOS 26.3 update but there is no internet access, the issue is usually caused by a damaged Wi‑Fi profile, VPN or Private Relay conflicts, DNS ...
If your iPhone 16 says it is connected to Wi‑Fi after the iOS 26.1 update but websites and apps do not load, the problem is usually caused by a broken network profile, Private Relay or VPN conflicts, ...