Do I have to be ranked to make it into UT Austin?

Hi guys, currently a freshman in high school and I live in one of the most competitive school districts in TX. My high school itself is extremely competitive and that significantly decreases my chances to get into the top 6%.

So is it necessary to be ranked to make it into UT?

Texas applicants in the auto-admit range have a 100% change of admission (though not necessarily for their intended major). But UT Austin admits probably only about 15% of non-auto-admit applicants (and rank obviously still matters in this group, along with various other application aspects).