As one of the most common scenarios of using PowerApps while having SharePoint lists as a data source.
It would be great if we can Export/Import this developed apps with it's associated SharePoint list(s) templates to be reused with different tenante (customer).
This can be added in the site collection Admin page as Install SharePoint PowerApp where a the exported file can be uploaded.
Updating status and adding @emmac and @KeremY