Only /dev/ttyS2 available

Hello all,

I working with a Rockpi4-SE, testing several OS.
I want a CLI version therefore, the first choice was ubuntu server…
I was looking for DEBIAN also, but the available releases are Desktop only and therefore I tried to build my own using “rbuild - Radxa Image Builder” and it was amazing… very light Debian version with cli only.
Until I tried to connect to my devices over UART and found that it only has ttyS2 available.

Can someone help me?
How can I make the other uarts avalible?

Thank you in advance…
PS: I’ve installed the rockpi overlays (sudo apt install rockpi4-dtbo rockchip-overlay -y)