You don’t think Google will push Chrome to iOS users with banners when they search, use YouTube, Gmail, etc?
That’s what they did on desktop.
That’s what they did on desktop.
You have a bunch of other options including security keys, TOTP, and existing device verification flow.
I doubt most users are using a dedicated third-party authenticator.
It’s clearly on purpose to force me on their apps.
A Chrome-only web will edge out not just up to date competing browsers but any older iOS and Android devices that can't run top of tree Chrome.