If, at marriage, you agreed that she wouldn’t wear Western clothing, you have a basis to criticize if she breaks that agreement. Even without a clear rule, in Pakistan, societal norms expect moderate clothing.
From a religious perspective, hijab was historically for free women to distinguish them from slaves, whose chests were often uncovered in slave markets or even during prayer. If your objection is only because scholars say so—not based on personal moral sense—this wasn’t exactly the Prophet’s or Sahaba’s stance.
If you won’t change your view and she insists on Western clothing, you could also act more Western, make female friends (just friends), and if she criticizes you, you can fairly criticize her. Then you both can agree to avoid both behaviors for mutual peace.