Weird iPhone 17 Pro WiFi situation

Just because you see a WiFi signal indicator does not mean you are connected to the internet. It just means your connected to a WiFi network. That network may not have an internet connection. Do you have any other devices you can try to connect to the internet using that network? Or another network you can try?

If you have a VPN installed on your iPhone, DUMP it. VPNs cause major connectivity issues on iPhone and aren't needed to begin with.

Connecting to Wifi is the first part and then getting connected to the Internet is the second

1. If you connect to Wifi, doesn't necessarily mean you are connected to the internet. If you are not connected to wifi could be a problem with iPhone settings or Router/Modem Settings
2. If you are not connected to the internet is the sole issue of Router / Modem Settings. Contact your ISP immediately

For your Internet connection.

• Over Cellular: contact your Carrier (Cellular Service Provider). The agency that issued the SIM to you
• Over WiFI: Contact your ISP (Internet Service Provider), the agency that provided the Internet Service on your Modem/Router to you

However --> Connect iPhone to the Internet - Apple Support