To be honest, even for TAMU, it is not supposed to be likely. You got accepted via TAMU diversity goal (33%, on which TAMU failed to meet diversity goal the last 5 years) Korean speaking Asian will be a plus for both UT and TAMU diversity.
For UT Austin, if you get CAP, you can sign up for UTSA/UTA (Arlington), fulfilling CAP is guaranteed for COLA (may be except Economics). And that’s if UT Austin is your final goal.
For TAMU, even you get Statistics, you can try to change major by talking to advisors at the earliest possible NSC. Be prepared to provide valid reasons and arguments. TAMU will work for you.