How to restore my iphone without losing data after 10 failed attempts of passcode entering?

The passcode is there to keep others from accessing your phone without the passcode. If you can’t remember your passcode, you'll need to erase your iPhone, which deletes your data and settings, including the passcode. If you backed up your iPhone, you can restore your data and settings after restoring your iPhone. If you never backed up your iPhone before you forgot your passcode, you won't be able to save the data on your iPhone. Follow the steps below to remove your passcode.

https://support.apple.com/en-us/HT204306