How do i get PS4 controller work with RPI4 & FFxiv ?

[My dog is gay]

Hello.

Here is my setup :

Raspberry Pi 4 with Dietpi & Steamlink on TV through hdmi : OK
PS4 controller (Dualshook4) connected with bluetooth to RP4 : OK
Controller setup as "PS4 controller" in steamlink : OK
Controller setup in steamaccount > : OK

Launching FFXIV > set up > controller > active.
But the PS4 controller isn't available in the list.
Does anyone have tried that configuration ?

Should the controller be connected with bluetooth to the RP4/steamlink or to the main PC/steam ?