Create iOS Home Screen Shortcuts on Chrome for iOS
For completeness:
https://developer.chrome.com/multidevice/android/installtohomescreen
Does Add to homescreen work on Chrome for iOS?
No.
Can't change the default browser, but try this (found online a while ago). Add a bookmark in Safari called "Open in Chrome" with the following.
javascript:location.href=%22googlechrome%22+location.href.substring(4);
Will open the current page in Chrome. Not as convenient, but maybe someone will find it useful.
Works for me.
The is no API for adding a shortcut to the home screen in iOS, so no third-party browser is capable of providing that functionality.