The PT Admissions office at Arcadia told me they typically expect at least 2 attempts at the GRE. But they use the GRE as a way to filter out applicants, so as long as you meet the requirement, they don’t pay attention to what your score is. I’d recommend reaching out to the programs and ask them what their philosophy of the GRE is. Some don’t use it, some use it to filter applicants and others use it as an important part of the application.