Assuming you were using Google Photos app, and you did turned on the 'backup and sync' feature for this app, you can simply go to https://photos.google.com and your photos would be there.
Alternatively, if you had an SD card in the phone, and were storing photos, a reset would not have wiped the photos there. You would have immediately seen those using the Google Photos app.
If neither of these were done, unfortunately, it isn't possible without thousands of dollars of forensic recovery tools to get back your photos.