Administrators should be able to remove/disable the Export-Control on a tenant level, so App-Maker can't use them in PowerApps.
When using the export control, any list data can be exported. The exported data is simple zip with three plain .json files. One of them called data.json, contains all the selected data, e.g. a List the user has access to.
This enables any App Maker in the organization, to export data. This works even if in list advanced settings, "Allow items from this list to be downloaded to offline clients?" is set to NO.