It seems you know little about copyrights and Patents.
Cloning the hardware does not infringe copyright as the function of the Amiga has been copied NOT the design itself.
Patents in most places last a maximum of 20 years so anything on the market on or before 1988 is fine from a patent point of view.
The software loaded from the SD card is a whole different matter ! The software is however not supplied, so where no copyrighted material is supplied I cannot see what is the legal issue ?