First of all: Create backups, then create even more backups and then store them somewhere safe (not on the iPad)!
Details here: https://stagetraxx.com/user-guide/backups/
Then easiest way to move to a new device is to airdrop that file to the other device.
What I prefer: enable Cloud sync. First on the device containing your data, then wait for the sync to finish and then on the other device. But create a backup first before you start this!
Details here: https://stagetraxx.com/user-guide/cloud/