Yes, the business use percentage can be used for your home office as an additional asset. You will enter a new asset, like 'New Roof' and enter it just like the house for your home office with a date placed in service as 01/01/2024, if you didn't include it last year. When you reach the screen 'Depreciating Your Home', you will enter the additional asset if you are using actual expenses.
If you use the simplified method there is no need to enter the roof.