[1.15.2] How can I rotate the right arm by pressing P

Hello, I'm trying to create an event so when the player presses P it rotates the right arm so it looks like he's pointing at something and I've already created a keybind but it doesn't rotate the arm.

Here's my Event code: 

@Mod.EventBusSubscriber(modid = Main.MOD_ID, bus = Bus.FORGE)
public class PointEvent {
	
	@SubscribeEvent
	public static void pointEvent(RenderPlayerEvent event) {
		PlayerEntity player = event.getPlayer();
		if(Keybind.LIFT.isKeyDown()) {
			Main.LOGGER.info("Rotated Arm!");
			event.getRenderer().getEntityModel().bipedRightArm.rotateAngleX = 0.5F;
		}
	}
}

And here's the keybind code:

public class Keybind {
    public static final KeyBinding LIFT;
    
    public static void init() {
        ClientRegistry.registerKeyBinding(Keybind.LIFT);
    }
    
    static {
    	LIFT = new KeyBinding("imam.key.lift", 80, "key.categories.imam");
    }
}