Joycon Spacer
We bought a second hand Nintendo Switch for my daughter that had some issues with joycons that kept disconnecting while playing. Everything worked fine while having them disconnected though (and they charged when put back in the dock) so I made a small spacer that keeps them off the console while still being attached. I've also added my .blend file if you want to use the model for some other type of joycon-mod.
It should work straight off the printer, but might need some sanding to get a perfect fit depending on your printers quality.