Arduino Nano 33 IoT not showing in MIDI Devices

[Nauthizful]

Hello, I just bought an Arduino Nano 33 IoT and uploaded code that I was using with a Mega and Hairless (was working with the mega)

Now that I have a Nano 33 IoT I want to use "USBMIDI_Interface" so I don't have to use Hairless and Loop MIDI. But the device is not showing neither in FL Studio or TH-U Overloud.

I installed MIDIUSB. If you have any tips to improve my code, I'll take it but for now I just want to be able to use my arduino as midi device, I'll optimize code later !

Thx for your help

Here is my code :

#include <Control_Surface.h>

const int COULEURS[8][3] = {
  { 0, 255, 255 },    //Rouge   0
  { 0, 0, 255 },      //Jaune   1
  { 255, 0, 255 },    //Vert    2
  { 255, 0, 0 },      //Cyan    3
  { 255, 255, 0 },    //Bleu    4
  { 0, 255, 0 },      //Magenta 5
  { 0, 0, 0 },        //Blanc   6
  { 255, 255, 255 },  //Éteint  7
};

//Déclaration des constantes des boutons
const int BUTTON1 = 2;
const int BUTTON2 = 3;
const int BUTTON3 = 4;
const int BUTTON4 = 5;
const int BUTTON5 = 6;

const int BUTTON6 = 7;
const int BUTTON7 = 8;
const int BUTTON8 = 9;
const int BUTTON9 = 10;
const int BUTTON10 = 11;

const int DUMMY_BUTTON = 53;

//Déclaration des constantes des pédales d'expression
const int EXP1 = A0;
const int EXP2 = A1;

//Déclaration des constantes des LEDS
const int LEDR = A3;
const int LEDB = A4;
const int LEDV = A5;

//Initialisation de l'interface midi
USBMIDI_Interface  midi;
//Initialisation de la Bank (3 banks avec 9 bouttons dans chaque)
Bank<3> bank{ 9 };

//Initialisation
IncrementDecrementSelector<3> selector{
  bank,
  { BUTTON10, DUMMY_BUTTON },
  Wrap::Wrap,
};

Bankable::CCButton button1{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON1,
  { BUTTON1, CHANNEL_1 },
};
Bankable::CCButton button2{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON2,
  { BUTTON2, CHANNEL_1 },
};
Bankable::CCButton button3{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON3,
  { BUTTON3, CHANNEL_1 },
};
Bankable::CCButton button4{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON4,
  { BUTTON4, CHANNEL_1 },
};
Bankable::CCButton button5{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON5,
  { BUTTON5, CHANNEL_1 },
};
Bankable::CCButton button6{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON6,
  { BUTTON6, CHANNEL_1 },
};
Bankable::CCButton button7{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON7,
  { BUTTON7, CHANNEL_1 },
};
Bankable::CCButton button8{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON8,
  { BUTTON8, CHANNEL_1 },
};
Bankable::CCButton button9{
  { bank, BankType::CHANGE_ADDRESS },
  BUTTON9,
  { BUTTON9, CHANNEL_1 },
};
CCPotentiometer exp1{ EXP1, MIDI_CC::General_Purpose_Controller_1 };
//CCPotentiometer exp2{ EXP2, MIDI_CC::General_Purpose_Controller_2 };

void setup() {
  pinMode(LEDR, OUTPUT);
  pinMode(LEDB, OUTPUT);
  pinMode(LEDV, OUTPUT);
  Control_Surface.begin();
}

void loop() {
  Control_Surface.loop();

  switch (bank.getSelection()) {
    case 0:
      setColor(COULEURS[0][0], COULEURS[0][1], COULEURS[0][2]);
      break;
    case 1:
      setColor(COULEURS[2][0], COULEURS[2][1], COULEURS[2][2]);
      break;
    case 2:
      setColor(COULEURS[4][0], COULEURS[4][1], COULEURS[4][2]);
      break;
    default:
      setColor(COULEURS[7][0], COULEURS[7][1], COULEURS[7][2]);
      break;
  }
}

void setColor(int rValue, int vValue, int bValue) {
  analogWrite(LEDR, rValue);
  analogWrite(LEDV, vValue);
  analogWrite(LEDB, bValue);
}