Doubts about installing on Debian 9.0 Linaro SBC RX3399

Hello
I use Debian 9.0
Debian Desktop md5sum: c6b12d484b69e08f0b0443a96457ea5b

I am trying to use Brave on Debian Linaro but it does not install on Rock Pi 4, I would like someone trying to solve the installation problem, I tried to install with the official instructions and it doesn’t work, this SBC uses ARM processor RX3399 I believe it needs to create a specific directory tree for it, but I don’t I can do that.
Thk.:blush: