Multiple required on

Select tag presents has got a long list of options. How can I make sure that at least 2 options are selected by the user? The first option is required, I also need the second to be required.

Here's the code:

    <select name="presents[]" id="presents" class="vv-select2-multiple" multiple required>
        <?php foreach(get_from_group('person', 'any', -1, ['tipo' => 'member']) as $member):?>
            <option value="<?= $member->ID ?>" <?php selected(get_user_person()->ID, $member->ID)?> required><?= $member->post_title; ?></option>
            <?php endforeach;?>
    </select>

source https://stackoverflow.com/questions/73841284/multiple-option-required-on-select