Bad WiFi
What if it says my WiFi is connected in Settings, but not in the top right hand corner?
iPhone 11
Question marked as
If your iPhone can navigate (despite not showing the wifi symbol on the right upper corner), have you tried a "forced" restart of your 11, using these gestures?
Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side (power) button. Only when the Apple logo appears (it might take 10-20 seconds), release that button (ignore all other screens that might appear, the one with the "slider" to turn the device off included).
If the issue persists, contact Apple Support, using this link:--> Get Support
Regards
Giulio