Office365 (PowerApps - form) is currently not supported in the Q&A forums, the supported products are listed over here: https://learn.microsoft.com/en-us/answers/products(more to be added later on).
For the related questions about Office365 (PowerApps - form)you can ask in here :https://techcommunity.microsoft.com/t5/office-365/ct-p/Office365
Thank you for your understanding.