If you linked your account to a platform, you can access the game again even if you delete it. For this, you should link your account to one or several of your YuyutoID, Google, Facebook, or Apple accounts. Linking your account will help you protect it in case of any issue with your device (malfunction, loss, theft, etc.). Linking your account is also the method you’ll need to move it to another device. Otherwise, you may lose your account and not be able to access it again.
These articles will help you avoid losing your account.