Hello Joannehegarty8,
Thanks for posting in the Apple Support Communities. We're happy to look into this with you. We understand that you're hitting a roadblock when attempting to provide permissions for your printer app to access your photos.
If you haven't done so yet, try the suggested actions provided here: Control access to information in apps on iPhone - Apple Support
Review or change access to information in apps
The first time an app wants to use information from another app, you receive a request with an explanation. For example, a messaging app may request access to your contacts to find friends who are using the same app. After you grant or deny access, you can change access later.
1. Go to Settings
> Privacy & Security.
2. Tap a category of information, such as Calendars, Reminders, or Motion & Fitness.
The list shows the apps that requested access. You can turn access on or off for any app on the list.
You may also need to verify the app you're using is running the latest software available for it. You can check for updates using the steps provided here: How to manually update apps on your Apple device - Apple Support
Keep us posted on how it goes!
Best regards.