I'm sorry to hear that Safari isn't working on your iPhone after the update. There are a few things you can try to fix the problem:

Restart your iPhone: This is the simplest solution, and it often fixes minor glitches. To restart your iPhone, press and hold the Sleep/Wake button until the red slider appears. Drag the slider to turn off your iPhone. Then, press and hold the Sleep/Wake button again until the Apple logo appears.
Clear Safari's history and website data: This can fix problems that are caused by corrupted data. To clear Safari's history and website data, go to Settings > Safari > Clear History and Website Data. Tap Clear History and Data to confirm.
Reset your network settings: This will erase all of your saved Wi-Fi networks and passwords, so you will need to re-enter them later. To reset your network settings, go to Settings > General > Reset > Reset Network Settings.
Check for iOS updates: It is possible that there is an update available for iOS that fixes the problem with Safari. To check for updates, go to Settings > General > Software Update.
Contact Apple support: If you have tried all of the above steps and Safari is still not working, you can contact Apple support for further assistance.

Here are some additional tips:

I hope this helps!

Safari not Working on iPhone after update