The Amiga IP has been sold and resold many times. Some organization still owns the Amiga IP. (Does anyone know who?) There is a danger of them coming out of the woodwork and causing problems, I guess.
Wikipedia claims that Gateway owns the patents, or whoever owns Gateway now. Cloanto owns the copywright's. All Amiga related rights were transferred in 2019 from Amiga, Inc to C-A Acquisition Corporation owned by a director of Cloanto.
Back in the day, Cloanto marketed a branded version of WinUAE with the Kickstart ROMs and OS and all that. I remember always wondering if it was worth buying.