Click on this link --> https://support.apple.com/HT201269 to learn how to "Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch". Select one of the three options: Quickstart, iCloud, or iTunes/Finder.
Alternatively backup the old iPad, then restore the new iPad from the backup, plus turn on iCloud (kind of what the previous link offers ).
To learn "How to back up your iPhone, iPad, and iPod touch" click here --> https://support.apple.com/HT203977
Click on this link to discover how to 'Restore your iPhone, iPad, or iPod touch from a backup' --> https://support.apple.com/HT204184
or watch this video if you're using a Mac to do this:
https://www.youtube.com/watch?v=Jbp3gGTQygg
Related information:
Use iCloud to transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch --> https://support.apple.com/HT210217
Some things are not stored in a backup. Click on this link and read "About missing information after you restore your iOS device with iCloud Backup" -->
https://support.apple.com/HT203768
