If you have completed the tutorial with a new guest account after reinstalling on a different device, you can link your existing account by following the steps below after the tutorial.

[Restore Previous Account]
1. Main screen → Top right menu → Option (Settings) → Link Account
2. Log in with Google/Apple → Select your account
3. There is already play data on the selected account. Which data would you like to link?
▶ Make sure to tap "Link with existing data.