When you need to add external scripts to the community portal frontend.

external_scripts_fluent_community.php

add_action('fluent_community/portal_head', function () {

    wp_enqueue_script(
        'my-ext-on-portal',
        'https://cdn.example.com/sdk.min.js',
        [], 
        null,
        false 
    );
});


add_action('fluent_community/before_js_loaded', function () {
    echo '<script src="https://cdn.example.com/analytics.js"></script>';
    echo '<script>window.MyAppKey = "PUBLIC_KEY_123";</script>';
});