Manufacturers like CarlinKit often release firmware updates to fix connection drops with newer iOS or Android versions.
AmberElec is highly optimized specifically for the RK3326 architecture. It offers a "pick up and play" experience with pre-configured settings for almost every console up to the PlayStation 1 and some Nintendo 64. rk3326 firmware
These updates are usually done via a USB flash drive (FAT32 format) or an "Over-the-Air" (OTA) update through the device's settings menu. You can often find the latest RK3326 firmware files on AliExpress Product Wikis or the manufacturer's official support page. How to Flash RK3326 Firmware rk3326 firmware