You can access Photo Requests from the Contribute page. Tap on 'Requests near me' to view them. Choose from the lower filter menu to see photo requests near your current location or from cemeteries where you have signed up to photo volunteer.
To enable Location services, go to the Settings app on your iPhone/iPad. Scroll down and in your apps select Find a Grave. Click on Location and choose "while using the app."
Another easy way to find open photo requests is to use the cemetery search or map. Cemeteries with green pins have open photo requests.