Twister on the Rock 3A?

Is there a tested and stable version of Twister for the Rock 3A?

Rather not but ask @jtremblant for details
As far as I could see twisteros has version for rk3399 devices (and it’s somehow based on armbian). Rock 3A is based on RK3568 and not much devices uses this SOC.

Well, you have to be aware that Twister OS has nothing to do with testing or (non)stability. They install wallpaper, some applications on top of Armbian and provide images under their name … You can also try to do that. The problem is that adaptation of new hardware takes a lot of time and costs - in this context - almost entirely Armbian developers time. FYI.