Have you heard about the newest PowerApps feature AI Builder?
AI Builder is a new Power Platform capability that allows you to easily automate processes and predict outcomes to help improve business performance. AI Builder is a turnkey solution that brings the power of Microsoft Artificial Intelligence through a point and click experience. Using AI Builder, you can add intelligence to your apps even if you have no coding or data science skills.
For anyone who is interested in adding AI features to PowerApps but does not yet have access to the trial due to location or licensing, it is possible to build your own PowerApps with AI features using Cognitive Services.
The new AI Builder features are much quicker/easier to implement than 'building your own' but not as flexible and do not cover all options (such as face recognition) yet.
I have some videos at my channel demonstrating face recognition, OCR, object detection, image captioning and tagging with step-by-step guides to implementing yourself: