how to recovery deleted recorded files from voice memos app in iphone 16 pro?

When you delete a voice memo, it goes to the Recently Deleted folder. I believe it will stay there for 30 days before it is permanently deleted. If you are not using iCloud, once they are deleted you may be able to recover from a backup, if one made before they were deleted. You also have the ability to sync them to iCloud. If you sync to iCloud they are not in your backup.