How to save data so that if the game is deleted, none of the data is deleted?

Question

Unity

Hello everyone, in general, I started making IAP in the game and the question arose:
How to save data so that after deleting and reloading the game, the data is not deleted?
That is, let's imagine the situation: A person bought "Remove ads" played a game. Well, he deleted it, then after a while he sees a suitable update, shakes it again and then bam and there is no ad removal. Buy again? but no because I save the data in PlayerPrefs. Well, in short. Who will tell you how to save?

Answer 1

Your purchase must be Nonconsumable, and when you start the application, you can receive all such user purchases.

Answer 2

Why not register in the application and save all user data in a database somewhere on your server?
When logging in, the user enters a password, if there is one on the database, take the necessary data and use it to load advertising, progress and other things, if not, create a new table and save the account in it. Something like this.
YouTube has tutorials on PHP and SQLite. But these are not the only technologies.