Say you demonstrate it in a fullproof way, what are you seeking damages for? A store kicking your product out according to the agreement?

I.e. the thing you need to show in court isnt that Google stopped selling your app in its store because it didn't like it rather that it's a monopolistic marketplace or the terms are somehow invalid or so on. These are much higher bars, especially with 3rd party stores and side loading being available and used on the platform. It's considered a battle to prove these things in the Apple ecosystem I can't imagine trying to prove them in Play first.