Apple wants to standardize the format of SMS OTPs (one-time passcodes)
zdnet.com
zdnet.com
I want 0 to do with SMS security, I am happy to use 2FA via an app, and backup codes, that I have to manually enter, with an insanely long 50 char password that's unique for each site.
Sim jacking is a real issue, and it's possible and sometimes easy to assume control of somebody's phone number.
SMS is also not a secure protocol in any way, shape or form. No security or privacy is built in, similar to emails.
Now if we go about adding something like private public key pair authentication that would be a good start, and a standardized "build your own security" where you can add as many layers to each site rather than relying on them to keep you secure which they often fail at.