The Teads inApp SDK handles the battery monitoring.
To prevent Teads inApp SDK to automatically set UIDevice.current.isBatteryMonitoringEnabled you can choose to disable battery monitoring by Teads inApp SDK just call disableBatteryMonitoring in adSettings.
TeadsAdPlacementSettings placementSettings = TeadsAdPlacementSettings();
await placementSettings.disableBatteryMonitoring();