Root Android 11 on Tinkers Board R2 S

[AJofre 0]

Trying to root Android 11 on Tinker Board:

We download the .img file (v1.0.6-20221003) from the following source: https://tinker-board.asus.com/download-list.html?product=tinker-board-s-r2

We extract the boot.img from the downloaded file and patch it with Magisk. 

At this point we couldn't able to reboot in fastboot mode, device gets stuck on the logo screen.

For enter on fastboot we tried: "adb reboot bootloader" , "adb reboot recovery" and then select bootloader, adb shell and then reboot bootloader. But same result.