I downloaded some data recovery apps from Play Store. They failed to recover my deleted data, but they show some hidden WhatsApp files like
Can they recover and steal my database file from them and upload it to their server?
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File recovery in newer Android OS is not possible.
Most data recovery apps over the years have just failed to recover anything.
Some fake recovery by trying to get leftover data from cache or thumbnails and show them as recovered. These apps claim to be able to recover deleted files. However, their effectiveness can vary, and they might require certain permissions or features that may not be available in Android's newer versions due to increased privacy and security measures.
Even if device is rooted any data recovery app needs to acquire permission with user intervention and can not directly access storage as low level disk access.