You can check to see if you can apply with out the email. I didn’t get the email but I went into my Wallet, clicked the + and continue and Apple Card was an option. I did sign up a while ago but didn’t get email. On Reddit a lot of people are signing up this way.
TU Fico 841 as of 4/2017, Experian Fico 830 as of 3/2017, Equifax FICO 839 as of 3/2017.