Transfer to new ipad from old

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.