Explanation
Edit a public or system view in app designer
You can change the way a public or system view is displayed by adding, configuring, or removing columns.
In the Views list for a table, select the Show list of references down arrow Drop Down. Edit View.Graphical user interface, application Description automatically generated Next to the view you want to edit, select Open the View Designer Open view Designer.
The view opens in the view designer.
When you edit a public or system view, you must save and publish your changes before they will be visible in the application.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/create-edit-views-app-designer