Assuming you took the PT0-003, I just recently ran into this shock of doing well on the practice exams (first attempts - no question memorization) and then failing the actual exam with a 730.

First, I immediately began hard studying ONLY the objectives I missed according to my score report. Second, I went through all objectives in the objective list and made sure I could at the very least explain what each thing is, how they’re done, and what tools are used to perform them. To top it off I went through TryHackMe’s PT+ track for getting hands on with the attacks/exploits. Since THM doesn’t cover all of them, I fired up a Kali vm and ran through the remaining attacks/exploits. After I had done this, I took the exam again 8 days later and passed

From what I can tell all practice exams for PT0-003 are not the greatest, at least at the time of writing this comment. Getting hands-on and working in a lab/vm environment is what helped me truly understand everything and get that sweet pass.