I can use the same leaderboard and achievement Android games in Google games

I have two games, one free (with advertising) and paid

On IOS, they share leaderboards and achievements in a group

Can I share a single leaderboard for these two apps in Google play game service? Can I link to the GPG profile of these two apps? They are all on the same platform (there are two different names XXX and XXX free)?

resolvent:

You can definitely use the same leaderboard and achievements

In your Google developer account, under the "game service" link, you can set up games. (all leaderboards and achievements, you want any / all versions of games to be available)

Then, under each game, you can link the application to the game. The linked application can contain up to 20 applications, covering Android / IOS / Web applications. If you like, the linked application can be 20 Android or 10 Android / 10 IOS, Or any combination of the three. Any of these can be free or paid.. and you can have multiple leaderboards, and each application determines which leaderboard to select and display / update from. If you want them to share the same leaderboard, that's good... If you want to set up a leaderboard for each specific platform / application version for some reason, That's also good, and there may be an overall leaderboard for all different applications. (from below, you can see that I have three different applications linked to the dice game, all three are Android, all are ready to be released, they all use the same leaderboard / achievement, and use room service)

The Google leaderboard tutorial does not detail the details you may be looking for. I hope it can explain how to set up multiple applications / platforms for a game, make it clearer, and be more confident that it really meets your requirements