If you applied for bright futures and made all the qualifications but the SAT score and the SAT testing was extended until December so you retook and received a high enough score do you have to submit a new application or does bright futures automatically get that score?
You would likely need to send them your new score through the College Board.
According to the Bright Futures website:
High school seniors are still required to submit the Florida Financial Aid Application (FFAA) no later than August 31, 2021 even if all requirements have not yet been achieved.
It is unclear whether you are expected to resubmit your application with the new SAT score or just send them the score. You should probably check with your school counselor and/or try calling the phone number for the Florida Department of Education Office of Student Financial Assistance listed at the bottom of their website. They should be able to give you the proper instructions to follow.