Hi Renan,
Thank you for reaching support. It is not possible to use the campaign_criterion_simulation resource with App Campaigns. CampaignCriterionSimulation is equivalent to the Bid Landscapes in the AdWords API for campaign criteria as mentioned in the Release Notes. Additionally, bid landscapes work with Search Network-only campaigns, Display Network-only campaigns, and Shopping campaigns as mentioned in the requirements section of this guide. Let us know if you need additional information.
Regards,
Nikisha Patel, Google Ads API Team