Deleted photos are kept in a trash bin for 30 days until they are permanently and irrevocably deleted from the Huawei smartphone, and can be restored at any time until the deadline expires.

Android 10 | EMUI 10.0
Step 1:  Open the  Gallery app
Step 2:  Tap on  Recently deleted
Step 3:  Choose a recently deleted  photo
Step 4:  Tap on  Restore
  1. Open the Gallery app
  2. Tap on Recently deleted
  3. Choose a recently deleted photo
  4. Tap on Restore

Huawei Instructions