You can try this:
"The default behavior of the Google Mobile Ads SDK is to serve personalized ads. If a user has consented to receive only non-personalized ads, you can configure an AdRequest object with the following code to specify that only non-personalized ads should be requested:
AdRequest request = new AdRequest.Builder()
.AddExtra("npa", "1")
.Build();
It's for Unity, but you can find solution for your platform.