Hi, Thanks for contacting us. I understand that you’d like to know if you will be credited or will the payment be adjust for your Apple TV and Arcade once you subscribe to Apple One. I’m happy to help.
No. If you sign up to Apple One after redeeming an offer like free year of Apple TV+, the redeemed offer will run at the same time as the available subscription in Apple One but will not impact the cost of Apple One. If Apple One is canceled, any remaining time on the redemption time continues.