The same thing exists for phone numbers. About 90% of my calls with US banks go like this:
"Ok, first, to verify you, what's your phone number?" (oh no, it's one of those, because why do they need to ask...) "<my phone number>" "Ok, you'll receive a te— oh. Oh no. This is not a real phone number. What's your REAL phone number?"
VoIP, in my case. Probably much more secure than the average big three carrier plan from a SIM swapping perspective, but try convincing banks or their “security” service providers.
"Ok, first, to verify you, what's your phone number?" (oh no, it's one of those, because why do they need to ask...) "<my phone number>" "Ok, you'll receive a te— oh. Oh no. This is not a real phone number. What's your REAL phone number?"