You can easily recover your photos from your mobile phone very easily here are two methods.
What to do if you do not have any computer or laptop device, how can you get this screenshot back from your phone itself such as cloud storage google photos?
Run both Google Photos and Photos apps on your Android phone.
Tap the “≡” icon in the upper left corner of the screen.
Select the “Trash” option on the pop-up window.
Preview the deleted photos and select the screenshots you have lost to restore on Android.
If you have not synced your phone with google drive then you can download and use the photo recovery application from play store. Here I am using diskdigger photo recovery.
Download diskdigger Photo Recovery from Play Store
Click Start Basic Photo Scan. Allow storage, it will take some time to scan all the photos you have deleted
pause the scan. select all the photos you want to recover and click on the recovery button. select the location you want to save the recovery screenshot