Private WiFi is not connect

See the following Apple articles:

Use private Wi-Fi addresses on iPhone, iPad, iPod touch, and Apple Watch

Use private Wi-Fi addresses on iPhone, iPad, iPod touch, and Apple Watch - Apple Support

Recommended settings for Wi-Fi routers and access points

Recommended settings for Wi-Fi routers and access points - Apple Support

Welcome to the Apple Support Communities.

First, Restart your iPhone - Apple Support and Update iOS on iPhone - Apple Support.

If the issue persists, see:

• Connect to Wi-Fi on your iPhone, iPad, or iPod touch - Apple Support
• If your iPhone, iPad, or iPod touch won't connect to a Wi-Fi network - Apple Support

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