Thank you for reaching out to us!
Just wanted to emphasize that Email is not considered a high security MFA factor, but if this scenario suits your use case, you can enable the required factors on your tenant and toggle on Show Multi-factor Authentication options as described in the doc. This should work on it’s own if you do not require a more customize behavior for user login.
Regarding your mention of using both phone number and verified phone number, I am not entirely sure regarding the use case for these two distinctly, but this separation could be implemented using Actions to determine the MFA behavior.