In the documentation for the Contact Provider Extension contact provider it says. This allows apps like Phone and Mail to provide personal names and images for incoming calls or messages when your app knows the caller or sender. Will Siri be able to find and call a contact by it's name that was provided to Phone via Contact Provider Extension? Thanks!

In the documentation for the Contact Provider Extension contact provider it says Use the Contact Provider framework if your app manages its own contacts and wants to make them available in other apps that use the Contacts framework. Is it possible to restrict the Contact Provider Extension to provide contacts to certain applications only? For example to prevent WhatsApp and Facebook accessing the the contacts via Contact Provider Extension. Only phone and iMessage should have access. Thanks

In the documentation for the Contact Provider Extension contact provider it says This allows apps like Phone and Mail to provide personal names and images for incoming calls or messages when your app knows the caller or sender. Instead of adding contacts directly with the Contacts framework, your app provides read-only contact items that it can update, and which the person using the app can easily enable, disable, add, or remove. Contacts stored in Phone/Contacts are getting backed up via iCloudBackup... what about contacts provided via the Contact Provider Extension? Are they also subjected to iCloudBackup, similar to the "regular" contacts? Thanks!