You can allow pop-ups on your iPhone using both the Safari and Chrome browsers, but each app has a different menu you'll have to use.
Apple is full of surprises in iOS. Nearly every icon on your home screen reveals a menu of options when you touch and hold. These have varying degrees of usefulness, but one that I’ve found most ...
To make Google Chrome the default browser on your iPhone, you'll need to download iOS 14 and then open its Settings page.