iPhone 14 stopped connecting to wifi iOS 26.0.1

Try restarting your router (even if all other devices work).

Also, do you have a 3rd party VPN installed, even if you are not using it? If so, delete the VPN profile in Settings/General/VPN & Device Management/VPN, then restart your device. Don't just turn it off; delete the profile. If that fixes it, you can try reinstalling VPN, but probably shouldn't.

Can you clarify for us please.......

Can the iPhone "see" and connect to the WiFi network......but not get an Internet connection?

Can the iPhone "see" the WiFi network but not connect to the WiFi network?

Or, can the iPhone not even "see" the WiFi network at all?

If you tap Settings > WiFi......is the setting to turn WiFi off and on grayed out?

If yes, to the question above......if you tap Settings > Bluetooth......is the setting to turn WiFi off and on grayed out?

Do you have a VPN installed on the iPhone?