Try ARDUINO_USB_MODE=2 (native MIDI only)

Disable CDC, use ESP32 core native USB MIDI stack

platformio.ini

@@ -13,8 +13,8 @@ build_unflags =
     -DARDUINO_USB_MODE=1
 
 build_flags =
-    -DARDUINO_USB_MODE=0
-    -DARDUINO_USB_CDC_ON_BOOT=1
+    -DARDUINO_USB_MODE=2
+    -DARDUINO_USB_CDC_ON_BOOT=0
     -DUSE_TINYUSB=1
 
 monitor_speed = 115200

src/midi_transport.cpp

@@ -13,8 +13,6 @@ UsbMidiTransport::~UsbMidiTransport() {
 bool UsbMidiTransport::begin() {
     Serial.println("[MIDI] Setting up USB MIDI device...");
 
-    // Novation Launchpad X identifiers so Loopy Pro recognizes us
-    TinyUSBDevice.setID(0x1235, 0x0103);
     TinyUSBDevice.setManufacturerDescriptor("Novation");
     TinyUSBDevice.setProductDescriptor("Launchpad X");
     TinyUSBDevice.setSerialDescriptor("LPX00001");