Use the Transfer to different OS option.
Source Device:
1. Go to Menu > Account Transfer > Transfer to different OS.
2. Choose a password and tap "Set Password."
3. Take a screenshot or note down the generated Transfer ID and password. Make sure to keep them safe and not share them with anyone else.
Target Device:
1. Go to Menu > Account Transfer > Transfer to different OS.
2. Enter the Transfer ID and password created on the source device, then select "Account Transfer."
3. Check the player name and rank displayed on the account you want to import and select "Account Transfer."