They seem like an unreliable narrator, at least by how they're describing smartphones. I don't believe the URL claim at all - on my phone I just see the domain and 5 characters after before it cuts off. A password reset type link would be a huge scramble of characters. They don't even mention leaving zoom.com. OTP notification popping down briefly makes much more sense. And visually it would be the same place as the URL bar.
A password reset URL would do this, but presumably the attacker wasn’t counting on the user forgetting their password (unless they had a way to force it?) And a usual “magic link” wouldn’t authorize the user to reset a password without confirmation to the original email, I would think?
I wonder if it was not a URL, but an OTP code that was visible on screen by showing up in a notification.