Power Apps has the feature to import and export applications in a different environment or migrate it across any tenants. It is very easy when it comes to standalone Power Apps and it is also possible to migrate list-based apps as well but not in a straight way.
Power Apps may contain many resources like connections, custom connectors, Power Automate, On-Premise resources, and Dataverse connections. These resources will all be included in the app package that is exported and it will be configured while importing the app. While exporting the app it won't contain any app data, all the codes, and rules will be stored in the source tenant. These data will migrate to the target tenant while importing the app.
Follow the below steps to migrate the app across the tenant,
Go to the source power app that you want to export. Click Export package as shown in the below screenshot.
On the Export package page, Enter the Name and Description for the Power app and then click on Export.
While Export the app, it will ask you to save the app in your local system, Just Save the app as it is.
Now go to the destination tenant site where you want to import the specific app. Click on Apps in the left navigation and then click on the Import canvas app from the top as shown below.
On the Import package page, click on the Upload button.
Now select the specific Zip file (exported app) from your local system which we want to import. Click on Open.
On the Package Details page, click on the Update of the import app. Select the Setup as Create as new from the right section of the page and click on the Save button as below screenshot.
Click on the Import button on the Review Package Content page.
Once we imported the Power apps in the destination tenant, then you will get a successfully imported page like the below screenshot.
Now click Open app to open the app in Power App Studio to re-configure the connectors.
Then, open the Data pane by selecting View > Data source, and select the connector and click remove as shown below screenshot.
Now select Add data > Connectors > SharePoint.
Under Connect to SharePoint site, enter the site URL that you want to use, and then click Connect.
Under Choose a list, select the checkbox for the list that you want to use, and then click Connect as like below.
That’s it, these are the steps to migrate Power Apps across the tenant and configure the connectors in the standalone apps. Feel free to fill up the comment box below if you need any further assistance.