Today SharePoint offer creating powerapps app directly from lists. these apps are in phone format.
In my company we use tablets. so it's important to implement this option rather than using phone layout in tablets.
Hi, an idea to generate apps in tablet layout has already been suggested, and is in Planning stage: https://powerusers.microsoft.com/t5/PowerApps-Ideas/Generate-app-using-the-tablet-layout/idc-p/55677...
When I create an app from a SharePoint list only 7 fields are created I have over 7 fields or columns in my SharePoint list
You will have to "Edit Fields" if you want to add others.
If anyone's curious about other options to design custom responsive forms which will fit tablets, PCs and phones, check out Plumsail Forms - https://plumsail.com/forms/
There is no support for mobile apps! But, in the browser view, the forms will automatically adjust to the width of the screen. SharePoint Modern UI and panel are both supported.
Just offering a tablet layout generally when creating using the "Start with your data" option would save hours!