Hello guys! i am a newby here and i just want to share with you something cool i found.
It turns out you can actually use the gamesir X3 Pro controller on the switch, and it actually works as intended. I'm using android, drastic and screen orientation app to change the orientation to vertical screen.
And that's really it, I hope some of you find this post useful, specially if you already have the controller and wanted to play DS on your switch.