Background Fade on Footer Social Media Links

Site URL: https://www.omnivorousadam.com/

Hi there,

Password to website: WaffleMan123

Currently all my social media links' (icons) backgrounds fade when you scroll over one. However, I added a custom one for TikTok.
Can someone help me with this?

Add to Design > Custom CSS

nav.sqs-svg-icon--list:hover a {
    opacity: 0.5;
}