You can apply for it many times, because the drone driver's license test needs to be trained by the unit authorized by AOPA. After the training, you can sign up for research and study together, about 15 to 20 days.

Aopa UAV driving test sequence: theoretical test → practical test → ground station test (the driver does not need to take this test within sight).

We should seize three opportunities during the exam and correct the questions and suggestions put forward by the examiner in time.