Challenging pre-trial detention for a female police officer after a road accident

I read news that the prosecution disagrees with the pre-trial detention measure for the female police officer who was driving during a fatal road accident in Pryluky, and plans to file an appeal. I am interested, can the court's decision be changed and a stricter pre-trial detention measure be imposed on the accused if the appellate instance sides with the prosecution? And what is usually taken into account when considering such appeals against pre-trial detention for police officers?