My iPhone randomly restarted and deleted everything

Hello ~ Take a lot here by clicking on below…

If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly - Apple Support

As for “deleting everything “ explain in more detail? It may be a hardware iss…

~Katana-San~

Smartphones lack both the inherent intelligence and the capability for malicious intent. Therefore, it becomes imperative for us to pay close attention to our device settings and the manner in which we synchronize our smartphones with Mac/PC/iCloud. Additionally, we must exercise caution when sharing sensitive and valuable information with friends and family members.

Be careful when sharing the device's sensitive and valuable information with friends and family members.

Thumb Rules:

1. Don't hand over an iPhone to kids or to a stranger without Enabling Guided Access
2. Don't share Apple IDs
3. Don't Jailbreak
4. Don't share sensitive information pertaining to your device
5. Don't give in to Phishing
6. Don't plug in your device in Airports and Public places through third-party cables and trust the device. Beware of Juice Jacking. (Especially in India)
7. Don't leave your iPhone unlocked and unattended in public places like offices, schools, malls, etc.