Of course, for working with Renesas RZ platform, you need a Renesas Platform Package and the Graphics Engine / RunTime Environment.
In case of Renesas RZ/A1H we have developed a specific Graphics Engine using the Renesas RGA graphics hardware and ARM NEON instructions in order to achieve the best graphics performance.
This means, we have everything up and running for RZ and customers are using that - but we do not have a read-to-use evaluation package for Rensas (like we have for STM, NXP, Microchip, Espressif)