The export/email features work under Procreate’s share icon feature.
The drawing can be shared to Google Drive/Photos, BOX, DropBox ( I believe you need to install these apps into the iPad, create an account/plan, login and, if necessary, pay for additional online storage.
Google offers 100 GBs of storage for $1.99/month. 200 GBs for $2.99/month.
Google has a free 15 GBs tier, but not sure how useful that is with lots of flattened or layered image files.
BOX has a free 10 GBs plan, but their offsite data storage plans are more expensive at 10/month for 100 GBs.
DropBox only has a free 5 GBs tier plan and all their data storage plans are higher priced, also.
Google has the much better deals for their online, offsite data storage options.
It maybe just best to send/share flattened image files to her email address as this is a totally free alternative to save her work without installing any more third party apps.
These are all the alternatives
Best of Luck to You!