That feature has serious bugs on iOS, and that's probably why it's not the default as Apple can't get it to be stable.

Don't ask him to add it, ask Apple, it's their fault. It's not a production feature.

And since it's Apple, you can't just use another browser as it's all the same crap on iOS.

You're stuck with something worse than the 2019 equivalent of IE6. iOS is a joke when it comes to web browsing.