not really, but seems available in different shops. I am sure there are also other boards that you can use as a controller. You can also mod existing game controllers with different buttons/sticks/etc with soldering, etc., there are so many modding projects like the gamecube joy cons..
100-in-1 Gameboy carts, HK imports and PS1 chips, early 2000s emulation, first flashcart was M3 Lite + Passcard soon after got the Wiikey, PS2 chip and since that time regularly read GBATemp.
I really like news on old gaming systems and things like "new" old consoles, retro flashlinkers, hardware modifications and comparison of picture quality.
https://www.retrorgb.com/
I knew this page for a while because of RGB modding and optimisation of retro systems, but I just found the blog...
For most emulators Retroarch is absolutely enough. +Dolphin +Cemu(if the system allows it) +Fightcade +maybe some others Retroarch does not support. Cool new frontend is Launchbox.
Here you can find a list of best emulators per system: http://nonmame.retrogames.com/
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day