I managed to find a method that works in this post:
www.raspberrypi.org
I also managed to pair my 8bitdo BlueTooth gamepad, the next problem is, that I was able to install emulators in Kodi, but with the exception of ScummVM and Vice not one of them is listed in the main menu or will start when chosen directly...
It also doesn't recognize my 4TB HDD via the Dock, just the 2TB ones, which is bad, since I planned on using it to watch DVDs I stored on my HDDs.
I try to send the rPI4B back, I have never encountered so many problems with any other system.
It won't recognize my 4TB HDD via the dock, just 2TB from the same brand.
It took me the whole day to make Netflix work (only works in LibreELEC with a lot of fiddling) and then most of the emulators simply won't work, so you'd need Lakka for that.
In the end I would have to have SD cards with three different OSes: Lakka for emulation, Kodi for Netflix, Raspbian for surfing and file management.
I'd rather get a MintBox Mini 2.