I got your child theme, I saw it but your child theme has so many errors found so it needs so much time to fix, so again you need to fix your code .here are some tips for you, include the latest version of fontawesome.css > asserts > css> font-awesome.css(same structure as parent themes) and on function.php wp_enquque font awesome css like :
add_action(‘wp_enqueue_scripts’, ‘business_mission_script_fix’, 100);
function business_mission_script_fix()
{
wp_enqueue_style( ‘font-awesome’,get_template_directory_uri().’/assets/css/fontawesome.css’ );
}
and you need to search all font awesome prefix ‘fa’ in theme and replace it by ‘fas’.
