Safari update
How to update the Safari just with iPhone
iPhone 12 Pro Max, iOS 15
Question marked as
Safari is maintained as part of iOS.
Latest version of Safari comes with latest version of iOS.
If you have iOS version 14.7 installed, iOS is up to date.
https://support.apple.com/en-us/HT211808
Settings > General > Software Update
Update your iPhone, iPad, or iPod touch