Uknown Charge
Why Im Being Charged For setting Up my payment method in my Iphone?
iPhone X
Question marked as
If it was for $1 (in the U.S. or roughly equivalent amount elsewhere), it may be a payment authorization hold that will be automatically reversed. See: About payment card authorization holds from the App Store or iTunes Store - Apple Support
Otherwise, see: If you see 'itunes.com/bill' or an unfamiliar charge on your statement - Apple Support