I've been doing some reading on simjacking lately, mainly around how one may be compromised. One common tidbit I read is that you can access your email and your other financial services if you have 2FA for those services. E.g.: here is one quote:
Once the swap is complete, messages containing codes for those two-factor authentication systems we now all have can be intercepted, and fraudsters can hop into your email, social media or mobile banking accounts.
I completely understand social media and mobile banking accounts could be compromised: if my mobile banking and/or social media accounts are set up to send the security code to my mobile device, and you simjack that device, then the fraudster can receive the code and log into your accounts.
However, assuming your email does not use your mobile number as recipient for 2FA (e.g. if you use TOTP, or if you have a back-up email address to send codes to), does simjacking actually give access to email? I can't seem to connect those two dots -- and I am not sure if I am missing something.