Project for the Web and PowerApps/Automate

Hi folks,

My understanding is that Project for the Web is a PowerApp that uses dataverse as the backend. I created my own basic canvas PowerApp with an edit form to the msdyn_projecttask table. It appears that the P4W data pulls in fine and is up to date, however, I am unable to save or update any of the information through the PowerApp. I typically get an error message telling me to use the P4W UI. Does anyone have a workaround or can explain the why behind this? Without the ability to filter and edit tasks across all projects P4W does not serve as a good solution for task management relative to a SharePoint List. Thanks in advance.