@Daryl yes, i confirm, i use this controller with USB 2.4 Ghz dongle.
I tried to use it in Retropie, there it worked fine.
In Recalbox, when i run run the command cat /dev/input/js0 in the console, it does not show any responds on left and right, other directions and buttons work correctly.

@Substring yes I did. I only found posts about the Wired Gamesir gamepad 😞

Nothing about the 2.4ghz version.

Recalbox doesn t use keyboard for game only gamepad.
Recalbox use snes mapping gamepad.
read manual : https://github.com/recalbox/recalbox-os/wiki/Manual-(EN)
keyboard is only in emulationstation.

Tu as des dizaines de dongle bluetooth conseillés sur le wiki...

Hi pal, should be corrected in 3.3.0. For now you're stuck.