This is as specific I can find from that notice: 

Q2. Are roofing expenditures that were necessary for the installation of solar panels eligible for the Residential Clean Energy Property Credit? (added December 22, 2022)

A2. In general, traditional roofing materials and structural components do not qualify for the Residential Clean EnergyProperty Credit because they primarily serve a roofing or structural function. However, some solar roofing tiles and solar roofing shingles serve as solar electric collectors while also performing the function of traditional roofing, serving both the functions of solar electric generation and structural support and such items qualify for the credit.