If she's using Gmail for contacts and google photos for photos, you can add her gmail account in Settings ➜ Apps ➜ Mail ➜ Accounts ➜ Add Account and Settings ➜ Apps ➜ Contacts ➜ Accounts ➜ Add Account.
For Photos you can download the Google Photos from App Store and log in with her account.
https://apps.apple.com/us/app/google-photos-backup-edit/id962194608
For anything else you can use the Move to iOS App when setting up the iPad to transfer all her info.
click here ➜ Move from Android to iPhone or iPad - Apple Support
Apps will not be transferred though. You will need to find and download the compatible versions in the Apple App Store.