RK3566 Displays
The RK3566 series was first sold in December 2021. There was an important hardware change in 10/2022. All tablets sold before this period are unfortunately not updateable to Android 13, as the mainboard was replaced. Accordingly, the firmware that is available after 10/2022 is also not compatible. The newer firmware has the designation v6. All tablets after this period can be upgraded to Android 13. Another Android version will probably not be possible, as the CPU manufacturer Rockchip would have to provide it.
Here is the link to the complete directory: https://fileshare.allnet.de/s/Kz7jggm53vwziPO
To install the firmware, please follow the instructions under the Prime One series.