World's Smallest Controller! Trying out the 8BitDo Zero 2

LINKS:
8bitdo Zero 2 controller: https://amazon.com/Bluetooth-Gamepad-Turquoise-Nintendo-Raspberry/dp/B083GJQPZ4/
Instruction Manual: https://download.8bitdo.com/Manual/Controller/Zero2/Zero2_Manual.pdf
SNES9x: https://play.google.com/store/apps/details?id=com.explusalpha.Snes9xPlus
My Boy: https://play.google.com/store/apps/details?id=com.fastemulator.gba
My OldBoy: https://play.google.com/store/apps/details?id=com.fastemulator.gbc
2600.emu: https://play.google.com/store/apps/details?id=com.explusalpha.A2600Emu