If the home is your main or second home, you are entitled to deduct the amount of interest you actually paid. If you are asking if you can deduct the portion of any interest your father paid but is not taking a deduction for in 2023, that would probably depend on your mortgage payment arrangement with your father and his reason for not taking a mortgage interest deduction in 2023.
Be sure to read the filing instructions on page 8 of Pub 936 when there are More Than One Borrower and only one received the 1098.
