Help with js. I have two selects that earn them with nested list dictionaries. I don’t know how to write a script so that when choosing a brand it would be possible to select only the selected brand, after choosing send a request with the brand and model of the car

<form action="" method="post" id="dynamic_selects">
    <div class="row">
        <select class="form-select" aria-label="Default select example" id="marka">
            <option value="0">Select auto</option>
            {% for car in marka_sorted %}
                <option value={{ car }}>{{ car }}</option>
            {% endfor %}
        </select>
    </div>
    
    <div class="row">
        <select class="form-select" aria-label="Default select example" id="model" disabled>
            <option value="0">Select model</option>
            {% for marka, model in marka_sorted.items %}
                {% for model_select in model %}
                    <option value={{ model_select }} class={{ marka }}>{{ model_select }}</option>
                {% endfor %}
            {% endfor %}

        </select>