Below you will find posts about forms and other ways of updating data in your Power App.
Forms and updates in Power apps
https://sharepains.com/2020/06/19/patch-vs-submitform-vs-update-power-apps/
https://sharepains.com/2020/04/27/power-apps-patch-with-formula-level-error-management/
https://sharepains.com/2019/11/11/using-power-apps-patch-to-create-a-sharepoint-list-item/
https://sharepains.com/2019/12/06/the-sense-and-nonsense-of-the-concurrent-function-in-power-apps/