Sure. I’ve pasted the anonymized code below:

<?php
/*
    Notice ID: my_requirements
    Notice Type: error
    Role: administrator
*/

    $settings = get_option('my_settings');

    $admin_messages = [];

    if( !isset($settings['key']) || $settings['key'] == '' ){
        $admin_messages[] = "A <strong>Key</strong> is required";
    }

    if( !isset($settings['secret']) || $settings['secret'] == '' ){
        $admin_messages[] = "An <strong>Secret</strong> is required";
    }

    if(count($admin_messages) > 0) {
        $messages = '';
        foreach ($admin_messages as $message) {
            $messages .= sprintf("<li>%s</li>", $message);
        }

        ?><p><strong>Warning!</strong> The following required settings for My Plugin are unset:</p>
        <ul>
            <?php echo $messages; ?>
        </ul><?php
    }?>

This works great except when I no longer have any errors I need to show because the admin has filled out the required settings, in which case the notice just shows up empty. If there’s a better way to do what I’m trying to accomplish, or if I missed a step somewhere, feel free to let me know.

Thanks