I just encountered to see your question, and I'm very familiar with iOS system, so I'd like to answer your problem.
First, you should know that Apple iOS device doesn't use common SSD drive to store the data, it used the NANS Flash Memory to store the data, so the hard drive data recovery will not work on, but it is possible to restore your iPhone data.
I collected two methods to recover lost data from iOS devices:
Method 1: Restore from your iCloud backup
Restore from your iCloud backup, if you used iCloud to backup your phone, see iCloud: Backup and restore overview, or estore from a backup you made with iTunes on your mac or PC.
Method 2: recover with iPhone data recovery software
Even the data was deleted from iPhone, but it is still stored in the NAND flash drive, with iPhone data recovery, uses can easily restore deleted data from iPhone, iPod and iPad.
Suggestion: It is highly recommended to have a regular backup for your iPhone in order to minimize you’re lost of iPhone.
Hope my answer helps you!!!
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