How does Huawei recover the deleted photo files on 7X?

Huawei, I suggest you find a cloud backup in the settings. If cloud backup can be synchronized, it won't be so troublesome!

Then if you can't find it, connect your mobile phone to the computer and scan it with powerful data recovery software.

Just wait patiently until the scanning is completed, find the photos you need and save them in the folder you want to save. It is recommended to save it in the computer first.