Did anyone managed to get a PrusaPrinter connected to octoprint with the Zero using UART

Managed to install armbian focal beta 4 and octoprint,

Adapted this schema: https://cdn.help.prusa3d.com/wp-content/uploads/3pinout-398x600.jpg

from here: https://help.prusa3d.com/en/article/prusaprint-rpi-zero-and-octoprint_2180

But octoprint will not find the Prusa.

Do I have to activate UART somehow?

Try this image https://github.com/ludiazv/octocitrico
and maybe try follow these instructions