They already have significant marketshare on iOS. But there's only so much you can get without official first party control or favoritism, e.g. Google being the

They already have significant marketshare on iOS. But there's only so much you can get without official first party control or favoritism, e.g. Google being the default search engine on browsers. An advertising campaign will pick up some more new users, sure, but this EU mandate doesn't really ramp things up unless an iOS Blink-based Chrome offers substantially better experience than the current WebKit-based Chrome.