But first way, the settings will be broken once you adjust the screen layout. The second way, adjustments won't persist unless you do the magic every time. While it's ok for a desktop, for the main screen it's quite annoying.
Yet another problem, the backlight stays on while the display is in sleep. I didn't find another HDMI-MIPI converter, so decided to save this display for another project and ordered another one. Still waiting for it to be delivered.
The original antennas are hard to remove from the Mac mini case, so I replaced them with 3 flexible PCB 4dBi 2.4/5GHz antennas. I didn't perform extensive testing, but in a few experiments, performance for both Bluetooth and Wi-Fi is similar to MacBook Pro 14"