If you have not seen your results for the AB-100 exam, it's important to note that for most exams, results are typically available within minutes after completing the exam. However, if you took a beta exam, results will not be available until the exam completes the beta process and goes live. In your case, since the exam was a beta version, it may take longer for the results to be processed and released.
You can expect your score to be available in your Learn profile within 24 hours after the exam has been scored. If you do not see your results after this timeframe, it may be helpful to check your profile again or contact Microsoft Credentials Support for further assistance.
References: