As I understand this, the wiping process deletes inode and directory tables. The data on the disk should not be zeroed out, though. So you can clone the /data partition using a tool like dd and than use a technique known as file carving to retrieve files. You can start from here: File/Data Carving & Recovery Tools | HackTricks
Those programs look for file headers, footers and signatures to identify files. Unfortunately not all files are being written continously one block after another. Retrieving fragmented files is much more difficult.
The best scenario is you can retrieve, or at least partially retrieve the metadata that points to actual files.