It wasn’t for a long time, but apparently they were able to crack it for emulation. That said, the whole appeal of the Analogue was for the genuine, native playback of physical cartridges. Emulation doesn’t seem to have basic features you’d expect from an emulation device like save states or fast-forward. If I were you, I’d go for something like the RG35xx or the Miyoo Mini +
It’s funny that people are arguing against you when the DS, Switch, and Gameboy/GBC are the 2nd, 3rd, and 4th top selling gaming consoles of all time. Like yeah, they’re all Nintendo consoles, but if other companies put in the same effort and marketing, they’d likely have similar results.