Located these 2 parts on Amazon which states :

About this item
• Fitment: The underbody rear air F deflector shield compatible with Chevrolet C8 Corvette 2020-2025.
• Direct OEM replacement (Part# 85580653/4) for ALL 2020, 2021, 2022, 2023, 2024, 2025 Chevrolet Corvette C8 model.
• Material: High-Impact stainless steel shields critical rear underbody components against road debris, rocks, and corrosion while maintaining lightweight performance.
• Reduces Air Resistance: Airflow deflector design reduces air resistance and turbulence.
• Increase downforce when driving at high speed to enhance the stability of road/track driving.
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• Quick Installation: Installs in minutes and reduce maintenance costs – protect your car's performance with this affordable solution.
• Quality Service: If you encounter any problems after purchasing the product, we have professional customer service staff to solve for you.

Thus, this was not designed as others claim as for cooling, but as it states above