Filter between dates in MongoEngine

Question

I have a problem filtering between date_from and date_to in MongoEngine.

This is the document structure

and the next MongoEngine query:

def devices_graph(device_name: str, date_from: str, date_to: str) -> list:
    device = (
        Device.objects(
            device_name=device_name,
            graph_data__date__gte=datetime.strptime(date_from, "%d/%m/%Y"),
            graph_data__date__lte=datetime.strptime(date_to, "%d/%m/%Y"),
        )
        .exclude("device_name")
        .exclude("last_update")
        .exclude("id")
        .exclude("rt_temperature")
        .exclude("rt_humidity")
    )

    return device

Im trying to get a list of emmbedded documents between to dates but i always getting a empty list. Someone can help pls