Android 9 ADB or root via Terminal

Hi, I would like to activate swap on rock pi 4 (128gb fast sd card) as the internal 1 GB is a limit.

Unfortunately, I cannot get my computer connected (via USB3.0 Type A to Type A cable, tried EVERY port, even over USB-Type-C to USB-Type-C to computer) to the rock pi to connect over adb, nor can I use the su binary via terminal emulator.

Also a adb connection over tcp seems to be impossible.

Has anyone ever had a successful root or adb shell connection to rock pi 4?