If Better Auth came with a simple builtin email implementation (i.e. just plug in SMTP credentials), I’d consider it perfect. (I’m not sold on Resend!)
Agreed that a builtin dashboard would be nice, but it’s not necessary by any means – you’ll still be building your own dashboard around your ORM models, which is of course what Better Auth uses, too.
But if you’re looking for something more like Clerk, maybe try Logto or Authentik?