You might instead consider the SwiftUI Contact Access Button (and if not using SwiftUI, use UIHostingViewController of the appropriate SwiftUI ContactAccessButtonView and .contactAccessPicker). See Meet the Contact Access Button and https://developer.apple.com/documentation/Contacts/accessing-a-person-s-contact-data-using-contacts-and-contactsui and https://developer.apple.com/forums/thread/756972.

For me, the inclusion of @Sendable eliminated the crash, but I’m also not seeing the artwork in the MPNowPlayingInfoCenter. Never mind, I had bypassed this code. My bad.