Isn’t it still the case that “third party” browsers on iOS are just wrappers around Safari/WebKit anyway?
For the longest time Chrome on iOS was just using WebKit/safari’s UIWebView then later WKWebView for rendering webpages, much like many other iOS apps that display web content. For various reasons the App Store rules have always banned third party browser rendering engines, I haven’t heard any change in this policy recently?
The only real advantage of Chrome on iOS was ancillary features like Google account bookmark/history sync etc if you are all in on Chrome elsewhere, which isn’t all that useful in the context of a link provided by Siri, for me at any rate. The feature that lets apps using WKWebView access your password/auto fill data only works with Safari on iOS as well, which is all the reason I need not to bother with the WebKit-wrapper rivals anyway.
The maps issue is significantly more annoying to me.