Transfer to new ipad from old
How to transfer data to new ipad
iPad Air 2, iPadOS 13
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These Apple support pages outline the available methods to transfer data from an old to new iPad:
https://support.apple.com/en-us/HT201269
https://support.apple.com/en-gb/HT210216
The principal mechanism to transfer data is to restore data from either an iCloud or iTunes backup - but QuickStart provides additional methods.
I hope this information proves to be helpful to you.