I want to update my daughter's iPad

That iPad is nearing 7, 8 or 9-years old,,now.

As of the beginning of 2019, many, MANY third party app developers are all more quickly and completely dropping app support for all old 7, 8 and 9-year iPads that are running 2-3 year old and earlier iOS versions.

Getting older versions of app for these old iPad models, initially from Apple’s iOS App Store is getting to be very difficult and problematic, now, and will only be getting much worse in the year 2020.

These old iPads are now reaching their end of life.

Time to consider a new or discounted, refurbished iPad from Apple.

If an old iPad that can no longer be upgraded or updated, then there will be no more apps available for initial download at all, soon, from the Apple iOS App Store, for such old iOS devices in the very near future.

Sorry & Good Luck to You!

If it’s running that then it’s very likely that the ipad is too old to run a newer iOS.

Your main way to get apps on that ipad would be to get a newer ipad model.