Unauthorized Apple.com bill for SAR 64.98

See this.

If you see 'apple.com/bill' on your billing statement - Apple Support

Does it show in your Purchase History, and if it does what does it say it is for:

View your purchase history for the App Store and other Apple media services - Apple Support

Any purchase that shows in your Purchase History requires authorization by you any anyone else you have authorized by giving them your credentials. You will see the authorization screen that shows the price and you must double click the side button followed by verification with FaceID or Passcode. For a free trial, you will also see the trial period and a message that says you must cancel at least 24 hours before the subscription start date to avoid charges.

If you do have a subscription, you will want to cancel it here:

View or cancel app subscriptions on iPhone - Apple Support

Let us know what you find out.