So the errors in that last journalctl were based on the service entry i made according to Garuda Hyprland doesn't lock the screen and doesn't go sleep in idle - #21 but apparently i fudged something up. I disabled that service and suspended again… it still doesn’t work but now the system takes a few seconds longer to turn off all the fans but the result is the same. After waking it up, the displays “turn on” but stay black, turn off again, turn on again and then just stay black.
The journalctl -xe | grep -i suspend doesn’t show me anything after i restart after such failed suspend / wake up process…