No cloud on modis RGB image

Hello everyone, today I tried to download all the images of an area for 6 months. I used the python library to perform the task. When I look at the result I have no image (out of 180) with clouds. I wonder how this is possible. Thanks for your help

script:
evalscript_true_color = “”"
//VERSION=3

    function setup() {
        return {
            input: [{
                 bands: ["B01", "B03", "B04"]
            }],
            output: {
                bands: 3,
                sampleType: "AUTO" 
            }
        };
    }

    function evaluatePixel(sample) {
        return [2.5 * sample.B01, 2.5 * sample.B04, 2.5 * sample.B03]
    }
    """

request_true_color = SentinelHubRequest(
    evalscript=evalscript_true_color,
    input_data=[
        SentinelHubRequest.input_data(
            data_collection=DataCollection.MODIS,
            time_interval=(date_in, date_out),
        )
    ],
    data_folder = "./all_file/",
    responses=[SentinelHubRequest.output_response("default", MimeType.TIFF)],
    bbox=betsiboka_bbox,
    size=betsiboka_size,
    config=config,
)
return request_true_color.get_data(save_data = True)

This specific MODIS product is a 16-daily (cloudless) mosaic, see: