I used the updated USB adapter 2 to connect my Old N30 arcade stick that still has not recieved a update. I set it to PC/Android mode and connected via bluetooth.

I did the same with my C2 2.4ghz that i bought on mistake. It allso connects fine over bluetooth. (no gyro etc, but works fine otherwise) As a bonus i feel the bluetooth connection on teh Adapter has less latency then i have experienced with some of the 8bitdo devices connected directly to the switch bluetooth. (Might just be a feeling though, i have not tested it extensively)

So if you have quite a few 8bit do devices like i do, and a few of them are yet to recieve an update this might be a workaround to getting them running on the switch 2.

(The arcade stick was really the priority for me, for playing SF6 with)

Also: remember to turn on usb pro controller support in the switch settings as people have missed that previously.