Downloading drivers for a is different than for NVIDIA or AMD because ARM (the designer) doesn't provide "installers" directly to consumers. Instead, drivers are integrated into your device's operating system by the manufacturer.
If you encounter issues with your Mali GPU driver, here are some troubleshooting steps: mali gpu driver download
If you are coding for Mali hardware, you don't need a "driver download" as much as you need the Graphics Development : Download the Arm Graphics Analyzer to optimize your code. Vulkan Support : Check the Arm Vulkan page Downloading drivers for a is different than for