Recommendation for Infobox / PopUp that works with Enfold and scroll-up feature.

Hey ti2media,
Try adding this snippet to your child theme functions.php:

function add_sticky_info_box() {
    ?>
    <style>
        .sticky-info-box {
            position: fixed;
            bottom: 120px;
            right: 20px;
            width: 300px;
            height: 300px;
            background: #ffffff;
            border: 1px solid #ddd;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            z-index: 9999;
            display: flex;
            flex-direction: column;
            padding: 20px;
            box-sizing: border-box;
            transition: opacity 0.3s ease;
        }
        
        .sticky-info-box.hidden {
            display: none;
        }
        
        .sticky-info-box-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .sticky-info-box-title {
            font-size: 20px;
            font-weight: bold;
            color: #333;
            margin: 0;
            flex: 1;
        }
        
        .sticky-info-box-close {
            background: none;
            border: none;
            font-size: 24px;
            color: #999;
            cursor: pointer;
            padding: 0;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s ease;
        }
        
        .sticky-info-box-close:hover {
            color: #333;
        }
        
        .sticky-info-box-message {
            flex: 1;
            color: #666;
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 20px;
            overflow-y: auto;
        }
        
        .sticky-info-box-button {
            background: #0073aa;
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            text-align: center;
            transition: background 0.2s ease;
        }
        
        .sticky-info-box-button:hover {
            background: #005a87;
        }
        
        .sticky-info-toggle {
            position: fixed;
            bottom: 120px;
            right: 50px;
            width: 50px;
            height: 50px;
            background: #0073aa;
            color: white;
            border: none;
            border-radius: 50%;
            font-size: 24px;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            z-index: 9998;
            display: none;
            align-items: center;
            justify-content: center;
            transition: background 0.2s ease;
        }
        
        .sticky-info-toggle:hover {
            background: #005a87;
        }
        
        .sticky-info-toggle.visible {
            display: flex;
        }
    </style>
    
    <div class="sticky-info-box" id="stickyInfoBox">
        <div class="sticky-info-box-header">
            <h3 class="sticky-info-box-title">Important Information</h3>
            <button class="sticky-info-box-close" id="closeInfoBox" aria-label="Close">×</button>
        </div>
        <div class="sticky-info-box-message">
            <p>This is your information box! You can customize this message to display any content you'd like to share with your visitors.</p>
        </div>
        <a href="/your-page-url" class="sticky-info-box-button">Learn More</a>
    </div>
    
    <button class="sticky-info-toggle" id="infoToggle" aria-label="Show information">ℹ</button>
    
    <script>
        (function() {
            var infoBox = document.getElementById('stickyInfoBox');
            var closeBtn = document.getElementById('closeInfoBox');
            var toggleBtn = document.getElementById('infoToggle');
            
            // Close the info box
            closeBtn.addEventListener('click', function() {
                infoBox.classList.add('hidden');
                toggleBtn.classList.add('visible');
            });
            
            // Show the info box again
            toggleBtn.addEventListener('click', function() {
                infoBox.classList.remove('hidden');
                toggleBtn.classList.remove('visible');
            });
        })();
    </script>
    <?php
}
add_action('wp_footer', 'add_sticky_info_box');

Then adjust the title, message, buttone text & link to suit. You can also adjust the CSS to change colors, etc.
It places the box & info button 120px from the bottom so they are above the scroll-top button, ratio than have them move if the scroll-top shows, which would not be so good.

Best regards,
Mike