I test today my web with gf.dev and i have a few suggestions.
1. Add 'rel=noopener' or 'rel=noreferrer' to social links (facebook, youtube etc.) or options to enable that.
2. Add Title to social links (example title="Facebook")
3. I'm not sure what mean this message. "Does not use passive listeners to improve scrolling performance"
4. jQuery is outdated and vulnerabiles, but know this is wordpress problem, not theme.
5. In Console see this error
"Refused to execute script from 'https://apollo13themes.com/support_us/json_expired.php?callback=jQuery1124017777876314703267_1588196901194&_=1588196901195'
because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled."