I have probably figured it out: On the PC, you have to switch off GSync and HDR, set the refresh rate to 144 Hz, then the menu function becomes active. But this makes no sense, because the picture is not optimal for gaming without GSync and without HDR. On the PC, it's better to game with GSync, HDR and 144 Hz - then you won't have any streaks. Aim Stabilizer is then not necessary/meaningful.
It didn't work at all with my PS5: The PS5 currently only supports 120 Hz. This does not match the 144 Hz of the monitor.
So the Aorus is not optimal for a PS5. According to the monitor display, the PS5 and the monitor only manage 60 Hz, even if the PS5 is set to 120 Hz.
Or does anyone have any other ideas on how to make the two run optimally together. (All my information refers to me via DP connection).

For Aim Stabilizer Snc to work, the refresh rate must be above 75 Hz.
A firmware update of the monitor to the latest version F07 may also help. LG Roger