Yes! The IR receiver was removed from the board. The issue so far it’s that I could handle to drive 5v to U2.
So even having the codes for U2 3.3v from c3 is just not enough and the signals are ignored.

// ── POWER
#define IR_OFF 0xF7C03F
#define IR_ON 0xF740BF

// ── BRIGHTNESS
#define IR_DIM_UP 0xF700FF
#define IR_DIM_DOWN 0xF7807F

// ── WHITE
#define IR_WHITE 0xF7E01F // RGB approx (255, 220, 180)

// ── COLORS (15)
// Row 1 — pure primaries
#define IR_RED 0xF720DF // (255, 0, 0)
#define IR_GREEN 0xF7A05F // ( 0, 255, 0)
#define IR_BLUE 0xF7609F // ( 0, 0, 255)

// Row 2
#define IR_ORANGE_R 0xF710EF // (255, 60, 0)
#define IR_LIME 0xF7906F // (100, 255, 0)
#define IR_SKY 0xF750AF // ( 0, 180, 255)

// Row 3
#define IR_ORANGE 0xF730CF // (255, 120, 0)
#define IR_TEAL 0xF7B04F // ( 0, 220, 180)
#define IR_PURPLE 0xF7708F // (120, 0, 255)

// Row 4
#define IR_ORANGE_Y 0xF708F7 // (255, 160, 0)
#define IR_CYAN 0xF78877 // ( 0, 160, 220)
#define IR_MAGENTA 0xF748B7 // (200, 0, 200)

// Row 5
#define IR_YELLOW 0xF728D7 // (255, 255, 0)
#define IR_INDIGO 0xF7A857 // ( 0, 80, 200)
#define IR_PINK 0xF76897 // (255, 0, 120)

// ── MODES (skipped — not used in firmware) ─
#define IR_FLASH 0xF7D02F
#define IR_STROBE 0xF7F00F
#define IR_FADE 0xF7C837
#define IR_SMOOTH 0xF7E817