I am a total emulator noob but think I have caught the emu-bug
I am try to work out if its better to use prebuilt $25 joy-con pairs and hope for someone to do a 3d print of a housing for the Radxa Zero.
Such as https://www.onbuy.com/gb/replacement-nintendo-switch-joy-con-wireless-controller-redblue~c9481~p23627032
The eco-sphere is huge and they can be used for others as they seem to be becoming a thing in there own right.
Then there are the really low cost parts with joysticks on ribbons and buttons that maybe could interface direct to a gpio board.
Or like some mobile holders sort of this style https://www.ebay.co.uk/itm/164423320191
But if you search you will even find usb-c phone sticks that maybe could be used. https://www.ebay.co.uk/itm/284369858338
For capabilities you need to do a google for some of the set-top box s905x2 as its the same chip minus ethernet.
I think the X96 Max was a pretty popular one as they go.
The X96s Dongle is the s905y2, X96 Max+ is S905x3