In addition to filling the Data Safety form, the new Play Store policy is to answer questions or fill in data related to Advertising ID, this app is using ads for monetization purposes, so when you want to publish your app on Google Play, it will detect the use of Advertising ID, this is a common thing because some of the libraries like google play services ads sdk and other related libraries used do integrate it for the needs of displaying ads, also Advertising ID declaration needed for sending push notification and analytics features.
