Migrating PowerApp From one DEV to UAT with Sharepoint Data

GovindPrajapat 

You can export the existing list to excel and create a new list using excel file as mentioned here: Create a list based on a spreadsheet - but unfortunately, it will change the internal names of the list columns due to which you will have to modify your app and flows accordingly.

So, you can create a new list using columns and list structure of existing list as shown here, Create a new list based on the columns in another list  and then follow:

1. Move / Copy list items from one list to another list using Power Automate flow. Similar template available at: Move items from one SharePoint list to another 
2. Copy list items from one list to another list using PowerShell or PnP PowerShell: SharePoint Online: Copy List Items from One List to Another using PowerShell 
3. Using PnP site & list template provisioning:
   • Export-PnPListToSiteTemplate 
   • Add-PnPDataRowsToSiteTemplate 
4. Using ShareGate or other 3rd party tools for migrating list and list items from one site to another - you can get free trial for ShareGate as well.

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